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江西省高安中學20082009學年度下學期期中考試

高二年級化學試題(奧)

命題人:          審題人:

相對原子質(zhì)量:H-1    C―12  O―16  Na―23   S―16

試題詳情

2009屆高考化學:常用化學藥品性質(zhì)和貯存

常用化學藥品性質(zhì)

(1)化學藥品性質(zhì):

1. 硫酸:H2SO4,無色油狀液體,比重15℃時1.837(1.84)。

在30-40℃發(fā)煙;在290℃沸騰。濃硫酸具有強烈地吸水性,因此它是優(yōu)良的干燥劑。

2. 硝酸:HNO3,無色液體,比重15℃時1.526、沸點86℃。紅色發(fā)煙硝酸是紅褐色、苛性極強的透明液體,在空氣中猛烈發(fā)煙并吸收水份。

3. 鹽酸:HCl,無色具有刺激性氣味,在17℃時其比重為1.264(對空氣而言)。

沸點為-85.2。極易溶于水。

4. 硝酸銀:AgNO3-無色菱形片狀結(jié)晶,比重4.3551,208.5℃時熔融、灼熱時分解。如沒有有機物存在的情況下,見光不起作用,否則變黑。易溶于水和甘油。能溶于酒精、甲醇及異丙醇中。幾乎不溶于硝酸中。有毒!

5. 過硫酸銨:(NH4)2S2O8-無色甩時略帶淺綠色的薄片結(jié)晶,溶于水。

6. 氯化亞錫:SnCl2無色半透明的結(jié)晶物質(zhì)(菱形晶系)比重3.95、241℃時熔融、603.25℃時沸騰。能溶于水、酒精、醚、丙酮、氮雜苯及醋酸乙酯中。在空氣中相當穩(wěn)定。

7. 重鉻酸鉀:K2CrO7-橙紅色無水三斜晶系的針晶或片晶,比重2.7,能溶于水。

8. 王水:無色迅速變黃的液體,腐蝕性極強,有氯的氣味。配制方法:3體積比重為1.19的鹽酸與1體積比重為1.38-1.40的硝酸,加以混合而成。

9. 活性炭:黑色細致的小粒(塊),其特點具有極多的孔洞。1克活性炭的表面積約在10或1000平方米之間,這就決定了活性炭具有高度的吸附性。

10. 氯化鈉:NaCl-白色正方形結(jié)晶或細小的結(jié)晶粉末,比重2. 1675,熔點800℃、沸點1440℃。溶于水而不溶酒精。

11. 碳酸鈉:Na2CO3?10H2O-無色透明的單斜晶系結(jié)晶,比重1.5;溶于水,在34℃時具有最大的溶解度。

12. 氫氧化鈉:NaOH-無色結(jié)晶物質(zhì),比重2.20,在空氣中很快地吸收二氧化炭及水份潮解后變成碳酸鈉。易溶于水。

13. 硫酸銅:CuSO4?5H2O-三斜晶系的藍色結(jié)晶,比重2.29。高于100℃時即開始失去結(jié)晶水。220℃時形成無水硫酸銅,它是白色粉末,比重3.606,極易吸水形成水化物。

14. 硼酸:H3BO3-是六角三斜晶白色小磷片而有珠光,比重為1.44。能溶于水、酒精(4%)、甘油及醚中。

15. 氰化鉀:KCN-無色結(jié)晶粉末:比重1.52,易溶于水中。有毒!

16. 高猛酸鉀:KnMO4-易形成淺紅紫色近黑色的菱形結(jié)晶,具有金屬光澤,比重2.71。能溶于水呈深紫色、十分強的氧化劑。

17. 過氧化氫:H2O2-無色稠液體,比重1.465(0℃時),具有弱的酸性反應。

18. 氯化鈀:PdCl2?2H2O-紅褐色的菱形結(jié)晶,易失水。

19. 氫氟酸:HF-易流動的、收濕性強的無色液體,比重在12.8℃時0.9879。在空氣中發(fā)煙。其蒸汽具有十公強烈的腐蝕性及毒性!

20. 堿式碳酸銅:CuC03?Cu(OH)2-淺綠色細小顆粒的無定形粉末,比重3.36-4.03。不溶于水,而溶于酸。也能溶于氰化物、銨鹽及堿金屬碳酸鹽的水溶液中而形成銅的絡合物

21. 重鉻酸銨:(NH4)Cr2O7-橙紅色單斜晶系結(jié)晶。比重2.15。易溶于水及酒精。

22. 氨水:氨水是無色液體,比水輕具有氨的獨特氣味和強堿性反應。

23. 亞鐵氰化鉀(黃血鹽):K4Fe(CN)6?3H2O-淺黃色的正方形小片或八面體結(jié)晶,比重1.88。在空氣中穩(wěn)定。

24. 鐵氰化鉀(赤血鹽):K3Fe(CN)6-深紅色菱形結(jié)晶:比重1.845。能溶于水,水溶液遇光逐漸分解而形成K4Fe(CN)6。在堿性介質(zhì)中為強氧化劑。

(2) 常用試紙性質(zhì):

1. 碘淀粉試紙:遇氧化劑即變藍(特別是游離鹵化物),因此,可以檢查這些物質(zhì)。

2. 剛果試紙:在酸性介質(zhì)中變藍,而在堿性介質(zhì)中變紅(在PH=2―3時,則由藍色轉(zhuǎn)變成紅色。

3. 石蕊試紙:為淺藍紫色(藍色)或紫玫瑰色(紅色)的試紙,其顏色遇酸性介質(zhì)變藍色而遇堿性介質(zhì)變成紅色。PH=6-7時則產(chǎn)生顏色變化。

4. 醋酸鉛試紙:遇硫化氫即變黑(形成硫化鉛),可以用來檢查微量的硫化氫。

5. 酚酞試紙:白色酚酞試紙在堿性介質(zhì)中則變?yōu)樯罴t色。

6. 橙黃I試紙:在酸性介質(zhì)中則變?yōu)槊倒迳t色,酸值在1.3-3. 2的范圍內(nèi),則則由紅色轉(zhuǎn)變?yōu)辄S色。

 

常見化學藥品的貯存

硝酸固碘硝酸銀,低溫避光棕色瓶。液溴氨水易揮發(fā),陰涼保存要密封。

白磷存放需冷水,鉀鈉鈣鋇煤油中,堿瓶需用橡皮塞,塑鉛存放氟化氫。

易變質(zhì)藥放時短,易燃易爆避火源。實驗室中干燥劑,蠟封保存心坦然。

解釋:

1、硝酸固碘硝酸銀,低溫避光棕色瓶:意思是說硝酸、固體碘和硝酸銀都屬于受熱見光易分解的物質(zhì),所以必須存放在棕色瓶里,并放在陰涼處。

2、堿瓶需用橡皮塞:意思是說盛放堿液的試劑瓶要用橡皮塞。

3、塑鉛存放氟化氫:意思是說氟化氫(氫氟酸)易腐蝕玻璃,因而必須存放在塑料或鉛制器皿中。

4、易變質(zhì)藥放時短:意思是說易變質(zhì)的藥品存放時間較短,即不能長久貯存,最好現(xiàn)用現(xiàn)配制[聯(lián)想:常見易變質(zhì)的藥品有:①氫硫酸放久了,則大部分將揮發(fā),部分被空氣氧化;②氯水長期存放將因慢慢分解而失效;③亞鐵鹽長期存放,則易被氧化為鐵鹽;④酸化的高錳酸鉀溶液長期存放則慢慢退色]。

5、易燃易爆避火源:意思是說易燃物質(zhì)(如:二硫化碳、酒精、丙酮、苯、硫、磷、鎂粉等)和易爆炸的物質(zhì)(如:氯酸鉀、硝酸銨等)存放時要遠離火源。

6、實驗室中干燥劑,蠟封保存心坦然:意思是說實驗室中用的干燥劑極易吸水,因而要用蠟封保存。

 

試題詳情

哈爾濱市第九中學2009年第三次高考模擬考試

英  語

本試卷分第I卷 (選擇題) 和第II卷(非選擇題)兩部分。考試用時120分鐘,共150分。            考試結(jié)束,將本試卷和答題卡一并交回。

注意事項:

1.答題前,考生在答題卡上務必用直徑 0.5 毫米黑色墨水簽字筆將自己的姓名、準考證號填寫清楚,并貼好條形碼.請認真核準條形碼上的準考證號、姓名和科目。

2.每小題選出答案后,用 2B鉛筆把答題卡上對應題目的答案標號涂黑.如需改動,用橡皮擦干凈后,再選涂其他答案標號.在試題卷上作答無效。

第一部分:聽力理解(共兩節(jié),滿分30分)

第一節(jié)(共5小題;每小題1.5分,滿分7.5分)

聽下面5段對話。每段對話后有一道小題,從每題所給的A、B、C三個選項中選出最佳選項。聽完每段對話后,你將有10秒鐘的時間來回答有關小題和閱讀下一小題。每段對話你將聽一遍。

1. What season are they in now?

A. Early winter.    B. Early spring.    C. Late autumn.

2. What sports does the woman like better?

A. Golf.          B. Tennis.         C. Don’t know.

3. What is John doing?

A. Listening to a wonderful music.

B. Playing a certain musical instrument.   C. Reading a book on music.

4. What can we learn from this conversation?

A. Helen agrees to go on picnic tomorrow.

B. Helen doesn’t enjoy going on picnic.

C. Helen thinks the weather won’t be good for picnic.

5. How did the woman read the book?

  A. She read it slowly.   B. She read it selectively.  C. She finished it without stop.

第二節(jié)(共15小題;每小題1.5分,滿分22.5分)

聽下面5段對話或獨白。每段對話或獨白后有幾道小題,從每題所給的A、B、C三個選項中選出最佳選項。聽每段對話或獨白前,你將有5秒鐘時間閱讀每小題。聽完后,每小題將給出5秒鐘的作答時間。每段對話或獨白你將聽兩遍。

聽第6段材料,回答第6至8題。

6. What is the main topic of the conversation?

  A. Friends      B. Sea birds.    C. A trip.

7. Why does the woman like going to the beach?

  A. Because she wants to sit in the sun.

  B. Because she is fond of watching the waves.

C. Because she enjoys observing sea birds.

8. When do they plan to meet again?  A. Saturday.    B. One year later.  C. Friday.

 

 

聽第7段材料,回答第9至10題。

9. Where does the conversation take place?

   A.  At a supermarket.   B. In an office.    C.  At a railway station

10. What do we know about the man?

   A. He is a manager.    B. He is a new comer.    C. He is late for work

聽第8段材料,回答第11至14題。

11. What is Tim’s attitude towards Christmas?

   A. Positive           B. Interested.          C. Passive.

12. What didn’t Tim enjoy Christmas?

   A. He was too busy to enjoy it.

   B. He had to pay a lot of money for it.   C. His kids enjoy it.

13. How much money is the average Christmas expense for U.S. families?

   A. $550.         B. $515.          C. $500.

14. Which of the following is not mentioned according to the dialogue?

   A. Family reunion.      B. Holidays.     C. Presents.

聽第9段材料,回答第15至17題。

15. Where does this conversation most likely take place?

A. At a science conference.

B. In a science laboratory.         C. In a professor’s office

16. Why has the woman come to this place?

A. To work on a project.

B. To talk with Professor Johnston.        C. To prepare for her presentation.

17. What does the woman say about her recent life?

    A. She’s been busy with her classes.

    B. She’s been working on the final paper.   C. She’s been working with George.

聽第10段材料,回答第18至20題。

18. What had the speaker done before he wrote the letter?

   A. He had played tennis.

   B. He had taken some exams.    C. He had fed cats.

19. What can we learn from the weather then?

   A. Hot        B. Rainy       C. Warm and sunny.

20. For whom does their family cook buy fish every day?

   A. For cats.    B. For their family.   C. For herself.

第二部分  英語知識運用(共兩節(jié),滿分45分)

第一節(jié)  單項填空(共15小題;每小題1分,滿分15分)

21. Here came ____ word that Obama was elected ____ president of USA.

A. a; the      B. /; the    C. the; /       D. /; /

22 ---Can I have two bottles of beer please?

   ----______. That'll be$20, please.

    A. Come on.      B. With pleasure   C. Don't mention it.    D. There you are.

23. ----People in China celebrate the Spring Festival. How about western countries?

----They_____ Christmas.

A.congratulate  B. observe  C. enjoy  D. spend

24. ----I’ll be waiting for you at home.

   ----_______ I were busy and couldn’t come?

A. What when     B. What if    C. How if      D. How when

25. ----Where shall we spend this evening?

----One of my friends will _____in the hotel for the night.

A.     fix us up  B. put us away  C. make us up  D. pick us up

26. ----Did you feel happy when you got the gift---keyboard from your son?

   ----Of course I was the proudest mother ______ on that day.

      A. only  B. still  C. ever  D. even

27. ----His film The Lord of the Ring is really wonderful.

----Absolutely! I’m sure that ______ else can match it

A.no one       B.none       C.nothing       D.nobody

28. ―Hello,Ben, I’m just checking if you can pick up Mary at the airport this evening.

   ―Oh,yes,I______ you about that.But I have to go to my daughter’s school play.

      A.will phone                                  B.have phoned

C.a(chǎn)m phoning                               D.was going to phone

29. ----The old people each     get a very nice present from our manager on their birthdays

    -----Great !It must be a big surprise to them.

A.must           B shall            C.would        D  should

30.  It’s ____ breakouts of bird flu that many monitoring station have been set up.

     A. controlled    B. to control     C. controlling      D. having controlled

31. ----Do you know my friend Harry?

   ----You mean the guy who _____ in America for four years.

   ---- Yes, and later he went to Australia.

A. has lived           B. lives         C. had lived       D. lived

32.  I’ll never forget such an attractive city        I spent many happy hours there with my classmates last summer holidays.

        A.that           B.where       C.in which            D. because

33. The moment Obama came into power, his unique foreign policy _____his best qualities.

    A. brought about   B. brought in  C. brought out  D. brought up

34. Much to his surprise, he invited only twenty friends to the dinner,but       came.

    A.twice as many as     B.a(chǎn)s many as twice

    C.twice as many       D.twice more than

35. ----How is the man injured in the earthquake?

   ----The doctor said if _____ in a proper way, he was likely to be saved.

A. treated    B. treating    C. is treated   D. to be treated

第二節(jié) 完形填空(共20小題;每小題1.5分,滿分30分

閱讀下面短文,掌握其大意,然后從36―55題各題所給的四個選項(A、B、C和D)中,選出可以填入空白處的最佳選項。

Walking down a path through some woods in Georgia, I saw a water puddle (泥潭) ahead on the path. I changed my __36__ to go around it on the part of the path that wasn’t covered by water and mud. As I reached the puddle, I was suddenly __37__! I was startled as well as unhurt, __38__ having been struck four or five times already. I _ 39   up a foot and my attacker stopped attacking me. Instead of attacking more, he circled in the air on   40  butterfly wings in front of me. Had I been hurt, I wouldn’t have found it __41__. It was funny, and I was laughing.  _42  , I was being attacked by a butterfly!

Having stopped __43 _, I took a step forward. My attacker rushed me again. He rammed me in the chest with his head and body with all his __44__. This time, I stepped back several paces to look the __45__ over. My attacker moved back as well to land on the ground. That’s _46 I discovered why my attacker was __47__ me only moments earlier. He had a mate and she was __48__. She was beside the puddle where he landed.

He had attacked me for his mate’s sake, __49__she was clearly dying and I was so large. He did so just to give her those extra few__50__ moments of life, should I have been careless enough to __51__ on her. Now I knew why and what he was fighting for. I couldn’t do anything other than __52__ him by walking in the more __53__ side of the puddle.

__54__ then, I’ve always tried to remember the courage of that butterfly whenever I see large obstacles facing me. I use that butterfly’s courage to __55__ myself that good things are worth fighting for.

 

36. A. mind

B. direction

C. pace

D. speed

37. A. caught

B. lost

C. stopped

D. attacked

38. A. despite

B. except

C. without

D. besides

39. A. hurried

B. picked

C. backed

D. took

40. A. transparent

B. forceful

C. graceful

D. fragile

41. A. amusing

B. amazing

C. terrifying

D. confusing

42. A. To be frank

B. In an instant

C. After all

D. As a result

43. A. fighting

B. walking

C. observing

D. laughing

44. A. wisdom

B. strength

C. enthusiasm

D. efforts

45. A. situation

B. attacker

C. puddle

D. trouble

46. A. how

B. where

C. when

D. why

47. A. noticing

B. charging

C. attracting

D. hunting

48. A. flying

B. hatching

C. sleeping

D. dying

49. A. if only

B. even though

C. so that

D. in case

50. A. worthwhile

B. enjoyable

C. precious

D. peaceful

51. A. pause

B. fall

C. knock

D. step

52. A. reward

B. help

C. avoid

D. please

53. A. narrow

B. difficult

C. different

D. smooth

54. A. Only

B. Just

C. Since

D. After

55. A. concentrate

B. remind

C. teach

D. inform

第三部分:閱讀理解(共20小題;每小題2分,滿分40分)

閱讀下列短文,從每題所給的A、B、C、D四個選項中,選出最佳選項,并在答題卡上將該項涂黑。

A

Dogs that can take out cash from ATMs and empty washing machines help disabled people lead more independent lives, but can they also help change disruptive (愛搗亂的) teenagers’ behaviour?

A unique TV experiment, “Dog House”, follows five unruly youngsters as they are taught to become dog trainers. The idea is simple. Kids really like dogs. But can the skills involved in training them―patience, consistency, rewarding good behaviour―give these teenagers the discipline they need in their own lives?

The teens involved were put forward by local schools in West Sussex, who had run out of ideas of how to deal with them.

Liam was typical―14 years old, bad-tempered, aggressive, foul mouthed and about to be permanently excluded from school. Allie, Rob and Ellie had similar problems―they couldn’t concentrate, they didn’t like being told what to do and they had serious anger problems. Katrina was different. She was so shy that she had developed fear of the outside world, she suffered from depression and had taken herself out of main-stream education.

Gradually, working with the dogs began to have an effect on the kids. But, in order to fully appreciate the significance of what they were doing, they needed to meet the disabled people who benefited from having these dogs. The meetings had a profound influence on the teenagers. After meeting Eileen Hobson and her dog Sailor, Liam changed his ways and his unlikely friendship with severely disabled wheelchair user Eileen blossomed.

Two months into the course Liam began to connect with the dogs too―particularly a young yellow Labrador called Aero. The relationship flourished so much that the dog often knew instinctively what the teenager wanted him to do before he’d even asked. “He just knows,” says Liam.

Liam’s school noticed a huge change in his whole outlook. His teacher Nick Brown said, “More than anything I see a confident and happy young man. It’s been excellent.”

56.The teens were selected to be dog trainers just because ________

A.they liked dogs very much

B.they came from the same local school

C.they ran out of ideas of how to behave in school

D.their teachers had some difficulty in dealing with them

57.What was Katrina’s problem?

A.She didn’t like being told what to do.

B.She had serious anger problems.

C.She was bad tempered and aggressive.

D.She had trouble in getting along with others because of her shyness.

58.The underlined word “ blossomed” in the fifth paragraph probably has the same meaning as ________

A.developed     B.decorated     C.expanded    D.declined

59.From the passage we know that ________

A.a(chǎn)ll dogs can retrieve cash from ATMs   

B.unruly youngsters can become good dog trainers

C.the skills in training dogs can really affect children’s behavior in school

D.the five teenagers were sullen and aggressive

B

Authorities did not release the gunman’s name, but Peter said he had no record of police contact or an arrest record while attending Northern Illinois.

DeKalb county coroner(驗尸官)Dennis J. Miller on Friday released the identities of the four victims who died in the county: Daniel Parmenter, 20, of Westchester; Catalina Garcia, 20, of Cicero; RyanneMace, 19, of Carpenters-ville; and Julianna Gehant, 32, of Meridan.

“Two other victims died after being transferred to hospitals in other counties”, Miller said. Witnesses said the gunman, dressed in black and wearing a stocking cap, emerged (浮現(xiàn))from behind a screen on the stage of 200-seat Cole Hall and opened fire just as the class was about to end around 3 p.m.

Officials said 162 students were registered for the class but it was unknown how many were there on Thursday.

Allyse Jerome, 19, a sophomore (大二學生)from Shaumburg, said the gunman burst through a stage door and pulled out a gun.

“Honestly, at first everyone thought it was a joke,” Jerome said. Everyone hit the floor, she said. Then she got up and ran, but tripped. She said she felt like “an open target”.

“He could have decided to get me, ” Jerome said on Friday. “I thought for sure he was going to get me.”

Lauren Carr said she was sitting in the third row when she saw the shooter walk through a door on the right-hand side of the stage, pointing a gun straight ahead.

“I personally army-crawled halfway up the passage,” said Carr, a 20-year-old sophomore. “I said I could get up and run or I could die here.”

She said a student in front of her was bleeding, “but he just kept running”.

More than a hundred students cried and hugged as they gathered outside the Phi Kappa Alpha house early Friday morning to remember Dan Parmenter, who was one of those killed.

60.Which of the following is true according to the passage?

A.Everyone thought it was a joke when the gunman appeared in front of them.

B.Peter had no record of police contact or an arrest record while attending Northern Illinois.

C.162 students were attending a lecture when the gunman emerged from behind the screen.

D.The gunman opened fire as soon as the class came to an end.

61.Who of the following is the witness?

A.Peters    B.Dennis J. Miller    C.Dan Parmenter    D.Lauren Carr

62.What was the first thing that Jerome did when she saw the gunman?

A.She got up and ran out of the room.    

B.She hit the floor.

C.She burst through a stage door and pulled out a gun.  

D.She tripped and became an “open target”.

63.What is the best title of the passage?

A.Witnesses Tell of Horrible Experience    B.A Cruel Shooter  

C.162 Killed in an Accident           D.An Unknown Gunman

 

                                    C

You Can’t Do It Even If It Hurts Nobody

    Who do you think breaks the law in our society?If you believe that only tough guys commit crimes,you may have to think again.Unlike in the movies,we can’t divide the world into bad guys and model citizens.Real life is much more complex.In the same way that diseases range from the common cold to fatal forms of cancer,crimes vary in degree.For example,smoking in an elevator will inconvenience people.but much less than threatening them with a gun.

    In addition to breaking the law themselves,people tolerate various levels of crime.Why are we tolerant of some crimes?It may be that,by seeing others do something,we accept it more easily.For instance,most people will find it easier to speed on a highway when everybody else is driving over the speed limit.So the people around us influence how much law-breaking we can tolerate.

    We must also wonder whether seeing violence on television or reading about it in the newspapers every day makes us tolerate crime more than we should.We become used to seeing blood on the news on television,or in magazines.Because we see thousands of dead people on TV,maybe we just try to ignore the situation behind the violence.

If so many citizens tolerate violence and crime,or even commit crimes themselves,it may simply be because of the human mind. Our minds may not care about specific laws.Instead,our minds may have a system of values that usually prevents us from hurting other people to improve our own lives.Yet,when it comes to respecting the rights of a mass of unknown individuals,we might not be so responsible.While most people would not steal a wallet containing$50,they may not mind cheating on taxes,because cheating on taxes does not hurt any one person.It hurts society,but “society” remains an abstract idea that is not as real as a neighbor or a friend’s friend.

    When we realize that many people have misconceptions about law-breaking,we could think it isn’t surprising that so many people have criminal records.How could we improve the level of honesty in our society?Would severe laws help make our society better?Probably not.Honesty will have to come from social pressure: in the family,at school,on the job,each and every one of us can encourage honesty by showing which behaviors are unacceptable.And teaching respect should become everyone’ s responsibility.

64.According to the author,“Real life is much more complex” probably means

    A.there is a wide range of people and crimes in the real life

    B.smoking in an elevator goes against laws in the real life

    C.there are more crimes than diseases in the real life

    D.model citizens sometimes break laws in the real life

65.What does the author think of the people who cheat on taxes?

    A.They take no notice of the human mind.

    B.They break the laws unaccepted in their minds.

    C.They hurt other people to improve their own lives.

    D.They aren’t concerned with some particular laws.

66.People tolerate violence and crime because__________.

    A.their behavior is the same as that of most other people

    B.they pay no attention to the truth behind the crimes

    C.most unlawful acts are not harmful to the individual

    D.they hold mistaken beliefs about law-breaking

67.What is the author’s purpose in writing this passage?

    A.To discuss whether laws are severe.

    B.To remind people to behave with honesty.

    C.To show people the importance of school education.

    D.To explain why so many people have criminal records.

                                 D

A popular saying goes,“Sticks and stones may break my bones,but words will never hurt me.”However,that’s not really true.Words have the power to build us up or tear us down.It doesn’t matter if the words come from someone else or ourselves---the positive and negative effects are just as lasting.

    We all talk to ourselves sometimes.We’re usually too embarrassed to admit it,though.In fact,we really shouldn’t be because more and more experts believe talking to ourselves out loud is a healthy habit.

    This “self―talk” helps us motivate ourselves,remember things,solve problems,and calm ourselves down.Be aware, though,that as much as 77%of self―talk tends to be negative.So in order to stay positive,we should only speak words of encouragement to ourselves.We should also be quick to give ourselves a pat on the back ,The next time you finish a project,do well in a test,or finally clean your mom,join me in saying “Good job!”

    Often,words come out of our mouths without us thinking about the effect they will have.But we should be aware that our words can call certain responses in others.For example,when returning an item to a store,we might use words,friendly language during the exchange.And the clerk will

 probably respond in a similar manner.Or harsh and critical language will most likely cause the clerk to be defensive.

    Words possess power because of their lasting effect.Many of us regret something we once said.And we remember unkind words said to us! Before speaking,we should always ask ourselves:Is it true? Is it loving? Is it needed? If what we want to say doesn’t pass this test,then it’s better left unsaid.

    Words possess power:both positive and negative.Those around us receive encouragement when we speak positively.We can offer hope,build self―esteem and motivate others to do their best. Negative words destroy all those things.Will we use our words to hurt or to heal? The choice is ours.

68.The main idea of the first paragraph is that        

    A.not sticks and stones but words will hurt us     B.inspiring words give us confidence

    C.negative words may let us down              D.words have a lasting effect on us

69.There is no sense for us to feel embarrassed when we talk to ourselves because――.

    A.a(chǎn)lmost everybody has the habit of talking to themselves

    B.we can benefit from talking to ourselves

    C.talking to ourselves always gives us courage

    D.it does no harm to have “self―talk” when we are alone

70.The underlined part in the third paragraph means that we should also timely     

    A.praise ourselves                 B.remind ourselves

    C.make ourselves relaxed           D.give ourselves amusement

71.The author would probably hold the view that        

    A.encouraging words are sure to lead to kind often

    B.negative words may stimulate us to make more progress

    C.people tend to remember friendly words

D.it is better to think twice before talking to others

                                E

Letter to the Editor

    A heated debate is currently going on in our town.Should we allow the cinema to be constructed in the Havenswood Shopping Center? There is just one large lot left to build on,and the theater would use up all of that space.Some people are excited at the idea of finally having our own movie theater.Others would rather travel ten miles to the nearest theater to keep our quiet town the way it is.They say it is enough to have Marvin’s Movie Video Rentals.After all,Marvin’s store keeps thousands of the latest videos.

    There are certainly benefits to renting videos.For one thing, you can plan your own schedule when it is convenient for you.You can relax on your sofa,and take a break whenever you need one.You can also talk to others without bothering any strangers seated nearby.In addition,it is a less expensive way to view a movie,especially if more than one person is watching the video.

    On the other hand.seeing a movie in a theater is an experience all its own.First,you can see the movie on a wide screen as the filmmaker intended.To be viewed on a television screen, a film must be changed in some way to make it smaller.One is the “pan―and―scan” method,which involves removing some of the details in the picture.The other way,called “l(fā)etterboxing”,keeps the image the way it is on the big screen,with one annoying exception; because the big―screen style is wide,the same picture on a television screen must be long and narrow.

    Another problem is sound.The sound from a television cannot compare to the sound system in a theater.Your experience of a movie improves when you can clearly hear all of the sounds.

Furthermore,at home,viewing companions often talk during a movie,which makes you miss out on what’s happening in the film.

    Besides.having a movie theater will not mean that you can’t still go to Marvin’s! You will just have a choice that you didn’t have before.Isn’t it time for Havenswood residents to enjoy a little progress?

72.Who is the author probably?

A.An editor of a newspaper.       

B.The manager of the nearest theatre.

C.A concerned citizen in Havenswoed.

D.The owner of Marvin’s Movie Video Rentals.

73.What is the advantage of renting videos?

    A.It won’t take up the large lot in the town.

    B.There’s no strict limit to the viewing time.

  C.People can enjoy better sound system.

    D.People can fully concentrate on their movies.

74.In the author’s opinion.the construction of a theatre will      

    A.reduce the profit of the Movie Video Rentals   B.save movie-goers money and time

    C.offer people another experience             D.disturb the peace in the town

75.Which of the following shows the structure of the passage?

(①―⑤stand for the paragraphs in the article)

高考資源網(wǎng)(www.ks5u.com),中國最大的高考網(wǎng)站,您身邊的高考專家。

第四部分:寫作(共兩節(jié))

第一節(jié):短文改錯(共10小題;每小題1分,滿分 10分)

此題要求改正所給短文中的錯誤。對標有題號的每一行作出判斷:如無錯誤,在該行右邊橫線上劃一個勾(√),如果有錯誤(每行只有一個錯誤),則按下列情況改正:

該行多一個詞:把多余的詞用斜線(\)劃掉,在該行右邊橫線上寫出該詞,并也用斜線劃掉。

該行缺一個詞:在缺詞處加一個漏字符號(∧),在該行右邊橫線上寫出該加的詞。

該行錯一個詞:在錯的詞下劃一橫線,在該行右邊橫線上寫出改正后的詞。

注意:原行沒有錯的不要改。

A person’s age no longer tells you something about                  76.________

his social position, marriage or healthy.There’s no longer         77.________

a particular year which one goes to school or goes to           78.________

work or gets married or start a family.The social clock             79.________

that kept us on time and told us when go to school, get                80.________

a job, or stop working isn’t as strong as it was used to be.         81.________

It doesn’t surprising us to hear a 28-year-old university             82.________

president or a 35-year-old grandmother, or a 70-year-old               83.________

man who has become a father for the first time.What we        84._______

all know, public’s ideas are changing nowadays.                     85.________

 

第二節(jié) 書面表達(共1小題;滿分25分)

假設你是李華,是哈爾濱某中學的高三學生。你的英國網(wǎng)友Jim發(fā)來電子郵件,告訴你他將于今年暑假來中國旅游,并決定來哈爾濱和你呆一周。但他有些情況不清楚。請你給他回一封電子郵件。

注意:1.詞數(shù):100左右;

         2.文中應包括方框內(nèi)所有的提示內(nèi)容,可以適當發(fā)揮。

高考資源網(wǎng)(www.ks5u.com),中國最大的高考網(wǎng)站,您身邊的高考專家。,高考資源網(wǎng)(www.ks5u.com),中國最大的高考網(wǎng)站,您身邊的高考專家。 

Subject: visit to China   From Jim

Dear Li Hua,

乘飛機到哈爾濱,到機場去接他。

然后乘車

去你家。

China and meeting you for the first time!

高考資源網(wǎng)(www.ks5u.com),中國最大的高考網(wǎng)站,您身邊的高考專家。 But I’m still not sure about the following:

1.When will you be free?

高考資源網(wǎng)(www.ks5u.com),中國最大的高考網(wǎng)站,您身邊的高考專家。

哈爾濱夏天氣溫較高,不用帶太多衣服

3. What’s the weather like there?

高考資源網(wǎng)(www.ks5u.com),中國最大的高考網(wǎng)站,您身邊的高考專家。4.What shall we do together?

參觀當?shù)刂L景名勝。

Your friend,

1,3,5

 

Dear Jim,

I’m so excited that you will come to China.

 

 

 

 

 

 

英語答案

www.ks5u.com

試題詳情

2009屆高考化學:除雜問題專題

除雜題除雜選擇試劑的原則是:不增、不減、不繁。

氣體的除雜(凈化):氣體除雜的原則: 不引入新的雜質(zhì)     不減少被凈化氣體的量

氣體的除雜方法:

試劑

除去的氣體雜質(zhì)

有關方程式

易溶于水的氣體,如:HCl、NH3

/

強堿溶液(NaOH)

酸性氣體,如:CO2、SO2

CO2+2NaOH=Na2CO3+H2O

SO2+2NaOH=Na2SO3+H2O

灼熱的銅網(wǎng)

O2

2Cu+O2====2CuO

灼熱的氧化銅

H2、CO

CuO+H2===Cu+H2O

CuO+CO====Cu+CO2

注意的問題:

需凈化的氣體中含有多種雜質(zhì)時,除雜順序:一般先除去酸性氣體,如:氯化氫氣體,CO2、SO2等,水蒸氣要在最后除去。

(2)除雜選用方法時要保證雜質(zhì)完全除掉,如:除CO2最好用NaOH不用Ca(OH)2溶液,因為Ca(OH)2是微溶物,石灰水中Ca(OH)2濃度小,吸收CO2不易完全。

(3)除雜裝置與氣體干燥相同。

典型例題

1. 填寫實驗報告

實驗內(nèi)容

選用試劑或方法

反應的化學方程式或結(jié)論

鑒別H2和CO2

 

 

除去稀鹽酸中混有的少量硫酸

 

 

考點:物質(zhì)的鑒別,物質(zhì)的除雜問題。
 。1)H2、CO2的化學性質(zhì)。
  (2)SO42-的特性。
  評析:①利用H2、CO2的性質(zhì)不同,加以鑒別。
  如H2有還原性而CO2沒有,將氣體分別通入灼熱的CuO加以鑒別。
  CuO+H2Cu+H2O
  或利用H2有可燃性而CO2不燃燒也不支持燃燒,將氣體分別點燃加以鑒別。
  或利用CO2的水溶液顯酸性而H2難溶于水,將氣體分別通入紫色石蕊試液加以鑒別。CO2使紫色石蕊試液變紅而H2不能。
 、趯儆诔s質(zhì)問題,加入試劑或選用方法要符合三個原則:(1)試劑與雜質(zhì)反應,且使雜質(zhì)轉(zhuǎn)化為難溶物質(zhì)或氣體而分離掉;(2)在除雜質(zhì)過程中原物質(zhì)的質(zhì)量不減少;(3)不能引入新雜質(zhì)。
  在混合物中加入BaCl2,與H2SO4生成白色沉淀,過濾后將其除去,同時生成物是HCl,沒有引入新的離子。
  答案:

澄清石灰水

Ca(OH)2+CO2=CaCO3↓+H2O

氯化鋇溶液

H2SO4+BaCl2=BaSO4↓+2HCl

2.下列各選項中的雜質(zhì),欲用括號內(nèi)物質(zhì)除去,其中能達到目的的是(  )

A  CO中混有少量CO2  (澄清石灰水)  

B  CO2中混有少量氯化氫氣體 (NaOH溶液)

C  O2中混有少量H2  (灼熱氧化銅)

D  N2中混有少量O2  (白磷)

分析: w.w.w.k.s.5.u.c.o.m

A  澄清石灰水能吸收CO2,不能吸收CO ,可到達目的.

B  CO2與HCl都和NaOH反應,故不能達到目的.

C  O2和H2 混合二者體積比不知道,通過灼熱氧化銅可能爆炸,不能達到目的.

D  白磷自燃且生成物為固體,除去O2,能達到目的.

回答除雜問題,一定要全面分析,既要除去雜質(zhì),又要使主要成分(被凈化的氣體)不變質(zhì)。

答案:       A   D

3.實驗室配制氯化鈉溶液,但氯化鈉晶體里混入了少量硫酸鈉和碳酸氫銨,設計一組實驗,配制不含雜質(zhì)的氯化鈉溶液。

提示:本題為除雜問題的實驗設計,這樣的問題一般要遵循“甲中有乙,加丙去乙,可產(chǎn)生甲,但不能產(chǎn)生丁”的原則。

答案:將不純的氯化鈉晶體溶于適量的蒸餾水中,滴加稍過量的Ba(OH)2溶液,使SO42及CO32(原HCO3與OH反應后生成)完全沉淀。再續(xù)加稍過量的Na2CO3溶液,以除去過量的Ba2。過濾,保留濾液在濾液中,滴加稀鹽酸至溶液呈中性(用PH試紙控制),得不含雜質(zhì)的氯化鈉溶液。

分析:為了除去雜質(zhì)NH4HCO3和Na2SO4,一般可提出兩個實驗方案:第一方案是利用NH4HCO3受熱(35℃以上)易分解成氣態(tài)物質(zhì)的特性,先加熱氯化鈉晶體除掉NH4HCO3,再加Ba2除掉SO42;第二方案是用Ba(OH)2同時除掉兩種雜質(zhì),這種方法簡便,“一舉兩得”,故優(yōu)先選用。w.w.w.k.s.5.u.c.o.m

具體操作步驟如下:①將不純的氯化鈉晶體溶于適量的蒸餾水中,滴加稍過量的Ba(OH)2溶液,使SO42及CO32(原HCO3與OH反應后生成)完全沉淀。

檢驗Ba(OH)2是否過量的方法:取少量濾液,滴幾滴Na2SO4或稀H2SO4,如產(chǎn)生白色渾濁或沉淀,則表示Ba(OH)2已過量。

②再續(xù)加稍過量的Na2CO3溶液,以除去過量的Ba2離子。過濾,保留濾液。

檢驗Na2CO3是否過量的方法,取少量濾液,滴加幾滴HCl,如產(chǎn)生氣泡則表示Na2CO3已過量。w.w.w.k.s.5.u.c.o.m

③在②之濾液中,滴加稀HCl至溶液呈中性(用PH試紙控制),就可得純氯化鈉溶液。

4、工業(yè)上制備純凈的氯化鋅時,將含雜質(zhì)的氧化鋅溶于過量的鹽酸,為了除去氯化鐵雜質(zhì)需調(diào)節(jié)溶液的PH值到4,應加入試劑是
  A.氫氧化鈉  B.氨水  C.氧化鋅  D.氯化鋅  E.碳酸鋅
  正確答案:CE
  解釋:本題為除雜題,原理是降低溶液中的[H+],將Fe3+轉(zhuǎn)化為Fe[OH]3以除去,所以應加入堿性物質(zhì),A、B、C、E均可滿足條件,但除雜的原則是不能引進新雜質(zhì),所以A、B排除,選出正確答案。

5、海水是取之不盡的化工原料資源,從海水中可提取各種化工原料。下圖是工業(yè)上對海水的幾項綜合利用的示意圖:

試回答下列問題:

①粗鹽中含有Ca2+、Mg2+、SO42等雜質(zhì),精制時所用試劑為:A 鹽酸;B BaCl2溶液;C NaOH溶液;D Na2CO3溶液。加入試劑的順序是                   

②電解飽和食鹽水時,與電源正極相連的電極上發(fā)生的反應為                 
與電源負極線連的電極附近溶液pH     (變大、不變、變。H1mol電子的電量為96500C,則用電流強度為100A的穩(wěn)恒電流持續(xù)電解3分13秒,則在兩極上共可收集到氣體    mL(S.T.P)。若保證電解后飽和食鹽水的濃度不變,則可采取的方法是                                

③由MgCl2?6H2O晶體脫水制無水MgCl2時,MgCl2?6H2O晶體在     氣氛中加熱脫水,該氣體的作用是                                                                                                  

④電解無水MgCl2所得的鎂蒸氣可以在下列        氣體中冷卻。

A  H2   B  N2    C  CO2   D  O2  

試題詳情

2006-2008年最近三年新課標探究性高考化學試題集錦

 

1.(2008廣東21.)(12分)

某種催化劑為鐵的氧化物;瘜W興趣小組在實驗室對該催化劑中鐵元素的價態(tài)進行探究:將適量稀硝酸加入少許樣品中,加熱溶解;取少許溶液,滴加KSCN溶液后出現(xiàn)紅色。一位同學由此得出該催化劑中鐵元素價態(tài)為+3的結(jié)論。

(1)請指出該結(jié)論是否合理并說明理由        。

(2)請完成對鐵元素價態(tài)的探究:

限選實驗儀器與試劑:燒杯、試管、玻璃棒、藥匙、滴管、酒精燈、試管夾:3 mol?L-1H2SO4/3% H2O2、6 mol?L-1HNO3/0.01 mol?L-1KmnO4、NaOH稀溶液、0.1 mol?L-1Kl、20% KSCN、蒸餾水。

①     提出合理假設

假設1:       ;

假設2:       ;

假設3:       。

②     設計實驗方案證明你的假設(不要在答題卡上作答)

③     實驗過程

根據(jù)②的實驗方案,進行實驗。請在答題卡上按下表格式寫出實驗操作步驟、預期現(xiàn)象與結(jié)論。

實驗操作

預期現(xiàn)象與結(jié)論

步驟1:

 

步驟2:

 

步驟3:

 

 

21。(1)   該結(jié)論不正確。稀HNO3有強氧化性,若該鐵的價態(tài)為+2價,則被氧化為+3價同樣可使KSCN溶液變血紅色。

(2) ①提出合理假設

假設1:催化劑中鐵元素的價態(tài)為+3價。

假設2:催化劑中鐵元素的價態(tài)為+2價。

假設3:催化劑中鐵元素的價態(tài)既有+3價也有+2價。

②設計實驗方法證明你的假設

③實驗過程

實驗操作

預期現(xiàn)象與結(jié)論

步驟1:將適量稀H2SO4加入少許樣品于試管中,加熱溶解;

溶液呈黃綠色,說明溶液中含F(xiàn)e2+或Fe3+。

步驟2:取少量溶液,滴加酸性KMnO4溶液。

若KMnO4溶液的紫紅色褪去為無色溶液,則說明催化劑中鐵元素的價態(tài)含+2價;若不褪色,則說明催化劑中鐵元素的價態(tài)不含+2價。

步驟3:另取少量溶液,滴加KSCN溶液。

若溶液變?yōu)檠t色,則說明催化劑中鐵元素的價態(tài)含+3價;若溶液無明顯變化,則說明催化劑中鐵元素的價態(tài)不含+3價。

2.(2008寧夏27).(15分)

為測試一鐵片中鐵元素的含量,某課外活動小組提出下面兩種方案并進行了實驗(以下數(shù)據(jù)為多次平行實驗測定結(jié)果的平均值):

方案一:將a g鐵片完全溶解于過量稀硫酸中,測得生成氫氣的體積為580 mL(標準狀況);

方案二:將 g鐵片完全溶解于過量稀硫酸中,將反應后得到的溶液用0.02000 mol?L-1

的KMnO4溶液滴定,達到終點時消耗了25.00 mL KMnO4溶液。

請回答下列問題:

(1)配平下面的化學方程式(將有關的化學計量數(shù)填入答題卡的橫線上):

□KMnO4+□FeSO4+□H2SO4=□Fe2(SO4)3+□MnSO4+□K2SO4+□H2O

(2)在滴定實驗中不能選擇       式滴定管,理由是         ;

(3)根據(jù)方案一和方案二測定的結(jié)果計算,鐵片中鐵的質(zhì)量分數(shù)依次為      

      ;(鐵的相對原子質(zhì)量以55.9計)

(4)若排除實驗儀器和操作的影響因素,試對上述兩種方案測定結(jié)果的準確性做出判斷和分析。

①方案一     (填“準確”“不準確”“不一定準確”),理由是       

②方案二     (填“準確”“不準確”“不一定準確”),理由是       

27.(15分)

(1)2        10          8            5            2            1            8

(2)堿             KmnO4是強氧化劑,它會腐蝕乳膠管

(3)       

(4)

①不一定準確       如果鐵片中存在與稀硫酸反應并能生成氫氣的其他金屬,會導致結(jié)果偏高;鐵片中存在與稀硫酸反應而溶解、但不產(chǎn)生氫氣的鐵的氧化物,會導致結(jié)果偏低;如果上述情況均不存在,則結(jié)果準確

②不一定準確       如果鐵片中存在與稀硫酸反應而溶解的其他金屬,生成的金屬離子在酸性溶液中能被高錳酸鉀氧化,會導致結(jié)果偏高;如果鐵片中存在與稀硫酸反應而溶解的鐵的氧化物,生成的Fe3+離子在酸性溶液中不能被高錳酸鉀氧化,會導致結(jié)果偏低;如果上述情況均不存在,則結(jié)果準確

注:本小題屬于開放性試題,若考生回答“準確”或“不準確”且理由合理,可酌性給分。例如:考生回答

方案一準確,因為鐵片中不存在能與稀硫酸反應并能生成氫氣的其他金屬,也不存在鐵的氧化物

方案一不準確,如果鐵片中存在與稀硫酸反應生成氫氣的其他金屬,會導致結(jié)果偏高;如果存在與稀硫酸反應而溶解、但不產(chǎn)生氫氣的鐵的氧化物,會導致結(jié)果偏低

方案二準確,鐵片溶于稀硫酸后,除Fe2+外,其他可能存在的金屬離子在酸性溶液中均不能被高錳酸鉀氧化,也不存在氧化鐵

方案二不準確,如果鐵片中存在與稀硫酸反應而溶解的其他金屬,生成的金屬離子在酸性溶液中能被高錳酸鉀氧化,會導致結(jié)果偏高;如果存在與稀硫酸反應而溶解的鐵的氧化物,千百萬的Fe3+離子在酸性溶液中不能被高錳酸鉀氧化,會導致結(jié)果偏低

3.(2008全國Ⅰ28.)(13分)

取化學式為MZ的黃色粉末狀化合物進行如下實驗。將MZ和足量的碳粉充分混合物,平鋪在反應管a中,在b瓶中盛足量澄清石灰水。按圖連接儀器。

 

 

 

 

 

實驗開始時緩緩通入氮氣,過一段時間后,加熱反應管a,觀察到管內(nèi)發(fā)生劇烈反應,并有熔融物生成,同時,b瓶的溶液出現(xiàn)白色渾濁。待反應完全后,停止加熱,仍繼續(xù)通氮氣,直至反應管冷卻,此時,管中的熔融物凝固城銀白色金屬。根據(jù)以上敘述回答:

(1)元素Z是         

(2)停止加熱前是否需要先斷開a和b的連接處?為什么?

                                   ;

(3)反應管a中發(fā)生的所有反應的化學方程式是

                                  

(4)本實驗的圍棋是否需處理?如需處理,請回答如何處理;如不需處理,請說明理由。

                                   。

[答案](1)氧

(2)不需要,因為一直通入氮氣,b中溶液不會倒吸到a管中。

(3)MZ+CM+CO↑  MZ+COM+CO2↑  CO2+C2CO↑  2MZ+C2 M+CO2↑ 

(4)需處理,因為一氧化碳有毒,應該進行尾氣處理,處理的方法可以將其在導管口點燃,或者用氣球收集,或接一個加熱的裝有CuO的玻璃管。

4.(2008江蘇18).(10分)“溫室效應”是全球關注的環(huán)境問題之一。CO2是目前大氣中含量最高的一種溫室氣體。因此,控制和治理CO2是解決溫室效應的有效途徑。

⑴下列措施中,有利于降低大氣中CO2濃度的有:         。(填字母)

      a.減少化石燃料的使用           b.植樹造林,增大植被面積

c.采用節(jié)能技術(shù)                 d.利用太陽能、風能

⑵將CO2轉(zhuǎn)化成有機物可有效實現(xiàn)碳循環(huán)。CO2轉(zhuǎn)化成有機物的例子很多,如:

  a.6CO2 + 6H2OC6H12O6        b.CO2 + 3H2CH3OH +H2O

c.CO2 + CH4CH3COOH         d.2CO2 + 6H2CH2==CH2 + 4H2O

以上反應中,最節(jié)能的是             ,原子利用率最高的是            。

⑶文獻報道某課題組利用CO2催化氫化制甲烷的研究過程如下:

反應結(jié)束后,氣體中檢測到CH4和H2,濾液中檢測到HCOOH,固體中檢測到鎳粉和Fe3O4。

CH4、HCOOH、H2的產(chǎn)量和鎳粉用量的關系如下圖所示(僅改變鎳粉用量,其他條件不變):

研究人員根據(jù)實驗結(jié)果得出結(jié)論:

HCOOH是CO2轉(zhuǎn)化為CH4的中間體, 

即:CO2HCOOHCH4

①寫出產(chǎn)生H2的反應方程式      

                               

②由圖可知,鎳粉是       。(填字母)

a.反應的催化劑

b.反應的催化劑

c.反應的催化劑

d.不是催化劑

③當鎳粉用量從1mmol增加到10mmol,反應速率的變化情況是          。(填字母)

a.反應Ⅰ的速率增加,反應Ⅱ的速率不變

b.反應Ⅰ的速率不變,反應Ⅱ的速率增加

c.反應ⅠⅡ的速率均不變

d.反應ⅠⅡ的速率均增加,且反應Ⅰ的速率增加得快

e.反應ⅠⅡ的速率均增加,且反應Ⅱ的速率增加得快

f.反應Ⅰ的速率減小,反應Ⅱ的速率增加

18.⑴abcd       ⑵a   c

⑶①3Fe+4H2OFe3O4+2H2       ②c    ③e

5.(2008上海)26.(B)某實驗小組用下列裝置進行乙醇催化氧化的實驗。

⑴實驗過程中銅網(wǎng)出現(xiàn)紅色和黑色交替的現(xiàn)象,請寫出相應的化學方程式

                                  

、                          ..在不斷鼓入空氣的情況下,熄滅酒精燈,反應仍能繼續(xù)進行,說明該乙醇催化反應是     反應。

⑵甲和乙兩個水浴作用不相同。

甲的作用是                 ;乙的作用是                               。

⑶反應進行一段時間后,干燥管a中能收集到不同的物質(zhì),它們是             。集氣瓶中收集到的氣體的主要成分是                             。

⑷若試管a中收集到的液體用紫色石蕊試紙檢驗,試紙顯紅色,說明液體中還含有             。

要除去該物質(zhì),可現(xiàn)在混合液中加入             (填寫字母)。

a.氯化鈉溶液     b.苯     c.碳酸氫鈉溶液     d.四氯化碳

然后,再通過      (填試驗操作名稱)即可除去。

26.(B)(本題共12分)

⑴2Cu+O22CuO  CH3CH2OH+CuOCH3CHO+Cu+H2O    加熱

⑵加熱  冷卻   ⑶乙醛  乙醇  水  氮氣   ⑷乙酸  c   蒸餾

6.(2007北京)28.(15分)北京市場銷售的某種食用精制鹽包裝袋上有如下說明:

產(chǎn)品標準

GB5461

產(chǎn)品等級

一級

配  料

食鹽、碘酸鉀、抗結(jié)劑

碘含量(以I計)

20~50mg/kg

分裝時期

 

分裝企業(yè)

 

     (1)碘酸鉀與碘化鉀在酸性條件下發(fā)生如下反應,配平化學方程式(將化學計量數(shù)填于空白處)

              KIO3    KI+    H2SO4    K2SO4    I2    H2O

(2)上述反應生成的I2可用四氯化碳檢驗。向碘的四氯化碳溶液中加入Na2SO3稀溶液,將I2還原,以回收四氯化碳。

①Na2SO3稀溶液與I2反應的離子方程式是                          。

②某學生設計回收四氯化碳的操作步驟為:

  a.將碘的四氯化碳溶液置于分液漏斗中;

  b.加入適量Na2SO3稀溶液;

  c.分離出下層液體。

 以上設計中遺漏的操作及在上述步驟中的位置是                      

     (3)已知:I2+2S2O32=2I+S4O62。某學生測定食用精制鹽的碘含量,其步驟為:

           a. 準確稱取wg食鹽,加適量蒸餾水使其完全溶解;

           b.用稀硫酸酸化所得溶液,加入足量KI溶液,使KIO3與KI反應完全;

           c.以淀粉為指示劑,逐滴加入物質(zhì)的量濃度為2.0×10-3mol?L-1的Na2S2O3溶液10.0mL,恰好反應完全。

①判斷c中反應恰好完全依據(jù)的現(xiàn)象是                       。

②b中反應所產(chǎn)生的I2的物質(zhì)的量是            mol。

③根據(jù)以上實驗和包裝袋說明,所測精制鹽的碘含量是(以含w的代數(shù)式表示)

                         mg/kg。

28.(15分)

(1)1、5、3、3、3、3

(2)①I2+SO32+H2O===2I+SO42+2H

     ②在步驟b后,增加操作:將分液漏斗充分振蕩后靜置

(3)①溶液由藍色恰好變?yōu)闊o色

②1.0×105

 

③4.2 ×102/w

w.w.w.k.s.5.u.c.o.m

 

7.(2007天津28).(19分)二氯化二硫(S2C12)在工業(yè)上用于橡膠的硫化。為在實驗室合成S2C12,某化學研究性學習小組查閱了有關資料,得到如下信息:

① 將干燥的氯氣在110℃140℃與硫反應,即可得S2C12粗品。

② 有關物質(zhì)的部分性質(zhì)如下表:

物質(zhì)

熔點/℃

沸點/℃

化學性質(zhì)

S

112.8

444.6

S2C12

-77

137

遇水生成HCl、SO2、S;

300℃以上完全分解;

S2C12 + C12  2SCl2

設計實驗裝置圖如下:w.w.w.k.s.5.u.c.o.m

⑴.上圖中氣體發(fā)生和尾氣處理裝置不夠完善,請你提出改進意見____________________________________________________________________________。

利用改進后的正確裝置進行實驗,請回答下列問題:

⑵.B中反應的離子方程式:_________________________________________________;

E中反應的化學方程式:_________________________________________________。

⑶.C、D中的試劑分別是__________________________、_______________________。

⑷.儀器A、B的名稱分別是____________、____________,F(xiàn)的作用是___________。

⑸.如果在加熱E時溫度過高,對實驗結(jié)果的影響是_____________________________,

在F中可能出現(xiàn)的現(xiàn)象是________________________________________________。

⑹.S2C12粗品中可能混有的雜質(zhì)是(填寫兩種)______________、________________,為了提高S2C12的純度,關鍵的操作是控制好溫度和______________________________。

28.(19分)

⑴.用導管將A的上口和B相連(或?qū)換成恒壓滴液漏斗)           (1分)

在G和H之間增加干燥裝置                                     (2分)

⑵.MnO2 + 4 H +2 C1 == Mn2 + C12 ↑+ 2H2O

    2 S + C12 S2C12                                 (各1分,共2分)

⑶.飽和食鹽水(或水)    濃硫酸                        (各1分,共2分)

⑷.分液漏斗    蒸餾燒瓶    導氣、冷凝                  (各1分,共4分)

⑸.產(chǎn)率降低                                                       (2分)

有固體產(chǎn)生(或其他正確描述)                                  (2分)

⑹.SCl2、C12、S(任寫其中兩種即可)                    (各1分,共2分)

控制濃鹽酸的滴速不要過快                                      (2分

8.(2007四川)26.在實驗室墮可用下圖所示裝置制取氯酸鉀、次氯酸鈉和探究氯水的性質(zhì)。

圖中: ① 為氯氣發(fā)生裝置;②的試管里盛有15mL30%KOH 溶液.并置于水浴中; ③ 的試管里盛有15mL 8 % NaOH 溶液.并置于冰水浴中; ④ 的試管里加有紫色石蕊試液; ⑤ 為尾氣吸收裝置。

請?zhí)顚懴铝锌瞻祝?br> ( l )制取氯氣時,在燒瓶里加人一定量的二氧化錳.通過_______________________

(坡寫儀器名稱)向燒瓶中加人適量的濃鹽酸。實驗時為了除去氯氣中的氯化氫氣體,可在① 與② 之間安裝盛有_____________________(填寫下列編號字母)的凈化裝置。

A.堿石灰  B.飽和食鹽水  C.濃硫酸  D.飽和碳酸氫鈉溶液

( 2 )比較制取氯酸鉀和次氯酸鈉的條件.二者的差異是:

______________________________________________________

反應完畢經(jīng)冷卻后,② 的試管中有大量晶體析出。右圖中符合該

晶體溶解度曲線的是_____________________(填寫編號字母);從②的試管中分離出該晶體的方法是____________________(填寫實驗操作名稱)

(3)本實驗中制取次氯酸鈉的離子方程式是:

___________________________________________

(4)實驗中可觀察到④的試管里溶液的顏色發(fā)生了如下變化,請?zhí)顚懴卤碇械目瞻祝?/p>

實驗現(xiàn)象

原因

溶液最初從紫色逐漸變?yōu)開___色

氯氣與水反應生成的H+使石蕊變色

隨后溶液逐漸變?yōu)闊o色

_______________________________________________

然后溶液從無色逐漸變?yōu)開___色

_______________________________________________

 

9.(2007.廣東23.)(11分)已知某混合金屬粉末,除鋁外還含有鐵、銅中的一種或兩種,所含金屬的量都在5%以上。請設計合理實驗探究該混合物金屬粉末中鐵、銅元素的存在。

僅限選擇的儀器和試劑:燒杯、試管、玻璃棒、量筒、容量瓶、滴管、藥匙;1mol/L硫酸、2mol/L硝酸、2mol/LNaOH溶液、20%KSCN溶液。

完成以下實驗探究過程:

(1)提出假設:

假設1:該混合金屬粉末中除鋁外還含有      元素;

假設2:該混合金屬粉末中除鋁外還含有      元素;

假設3:該混合金屬粉末中除鋁外還含有Fe、Cu元素;

(2)設計實驗方案

基于假設3,設計出實驗方案(不要在答題卡上作答)。

(3)實驗過程

根據(jù)(2)的實驗方案,敘述實驗操作、預期現(xiàn)象和結(jié)論。

【提示】Ⅰ.在答題卡上按以下方式作答,注意前后內(nèi)容對應;

        Ⅱ.注意文字簡潔,確保不超過答題卡空間。

編號

實驗操作

預期現(xiàn)象和結(jié)論

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.( 26.( 18 分)
( l )分液漏斗   B
( 2 )堿溶液(或反應物)的濃度不同,反應溫度不同

M     過濾
( 3 ) Cl2 + 2OH=ClO + Cl+H2
( 4 )

 

 

氯氣與水反應生成的HClO將石蕊氧化為無色物質(zhì)

黃綠

繼續(xù)通入的氯氣溶于水使溶液呈黃綠色

2006江蘇21.)(10分)稀薄燃燒是指汽油在較大空/燃比(空氣與燃油氣的體積比)條件下的燃燒。隨著全球能源危機的加劇,稀薄燃燒技術(shù)的研究受到了人們的重視,但稀薄燃燒時,常用的汽車尾氣凈化裝置不能有效地將NOx轉(zhuǎn)化為N2。不同空/燃比時汽車尾氣中主要污染物的含量變化如右圖所示。

⑴稀薄燃燒技術(shù)除能節(jié)約能源外,還具有的優(yōu)點是_______________(填一項)。排放到大氣中的NOx會導致酸雨、_______________等環(huán)境問題(填一項)。

⑵某;瘜W研究性學習小組的同學在技術(shù)人員的指導下,按下列流程探究不同催化劑對NH3還原NO反應的催化性能。

若控制其他實驗條件均相同,在催化反應器中裝載不同的催化劑,將經(jīng)催化反應后的混合氣體通過滴有酚酞的稀硫酸溶液(溶液的體積、濃度均相同)。為比較不同催化劑的催化性能,需要測量并記錄的數(shù)據(jù)是______________。

⑶若某一催化劑能同時催化NH3等還原性氣體與的反應NOx的反應。將該催化劑分別用于催化還原含等物質(zhì)的量NOx的兩種氣體:①純NO氣體,②汽車尾氣。消耗的物質(zhì)的量較多的可能是_______________(填字母),原因是______________________________。

A.①        B.②        C.都有可能

11.(2006廣東20).(12分)

        氧化銅有多種用途,如用作玻璃著色劑、油類脫硫劑等。為獲得純凈的氧化銅以探究其性質(zhì),某同學用工業(yè)硫酸銅(含硫酸亞鐵等雜質(zhì))進行如下實驗:

<cite id="bvlm1"></cite>

      I

            工業(yè)CuSO4           CuSO4溶液     CuSO4?5H2O   ……   CuO

             ①步驟I的目的是除不溶性雜質(zhì)。操作是                               

             ②步驟Ⅱ的目的是除鐵。操作是:滴加H2O2溶液,稍加熱;當Fe2+轉(zhuǎn)化完全后,慢慢加入Cu2(OH)2CO3粉末,攪拌,以控制溶液pH=3.5;加熱煮沸一段時間,過濾,用稀硫酸酸化濾液至pH=1?刂迫芤簆H=3.5的原因是                           。

             ③步驟Ⅲ的目的是得到CuSO4?5H2O晶體。操作是                      ,過濾,水浴加熱烘干。水浴加熱的特點是                                      。

             ⑵探究氧化銅的性質(zhì)

              ①取A、B兩支試管,往A中先加入適量CuO粉末,再分別向A 和B中加入等體積的3%H2O2溶液,只觀察到A中有大量氣泡。結(jié)論是                           。

              ②為探究試管A中反應的速率,收集氣體并測定其體積必需的實驗儀器有:

                                                                               

      ⑴①

      答案:加適量水溶解,攪拌,過濾

      ②答案:使Fe3+可全部轉(zhuǎn)化為FeOH3沉淀,而Cu2+不會轉(zhuǎn)化為Cu (OH)2沉淀。

      答案:將CuSO4?5H2O溶液加熱蒸發(fā)至有晶膜出現(xiàn)時 ,停止加熱。

      受熱均勻,溫度易于控制在1000C以下。

      ⑵①

      答案:CuO可加快H2O2分解的反應速率,是H2O2分解反應的催化劑。

      答案:秒表、橡皮塞、導管、集氣瓶、量筒。

       

      12.(2006上海)26(A)某課外興趣小組為了探究鐵與硫在隔絕空氣的條件下反應所

      得固體M的成分,設計了如右圖裝置。傾斜A使稀硫酸(足量)與固體M充分反應,待反應停止后,B裝置增重,C裝置中溶液無變化,反應后進入量氣管氣體的體積為VmL(已折算成標準狀況)

      由上述實驗事實可知:

      (1)①固體M中一定有的物質(zhì)是______________(填化學式)

      理由是______________________________________________________

      ②其中一種物質(zhì)的質(zhì)量可以確定為___________g(用代數(shù)式表示)。

      (2)B裝置的名稱是________。

        寫出B裝置中反應的離子方程式_______________________________________。

      (3)C裝置的作用是_________________________,如果實驗中沒有B裝置,則C裝置中產(chǎn)生的現(xiàn)象是____________________________________________________________________。

      (4)稀硫酸和固體M反應后溶液中還殘留淡黃色固體,該固體是_____________,要分離出該固體,在實驗操作中,除燒杯外還需要用到的玻璃儀器是_____________。

      (5)通過進一步實驗,測得固體M中各種成分的質(zhì)量之和小于反應前鐵粉和硫粉的質(zhì)量之和,產(chǎn)生這種現(xiàn)象的原因可能是_____________

        a.M中有未反應的鐵和硫    b.測定氣體體積時水準管的水面高于量氣管的水面

        c.A中留有反應生成的氣體    d.氣體進入D裝置前未用濃硫酸干燥

      26(A)(本題共12)

      (1)①FeS、Fe  B裝置增重、量氣管有氣體。②  V/11200

      (2)洗氣瓶  2OH-+H2S → 2H2O+S2--

      (3)證明H2S已被完全吸收   黑色沉淀

      (4)  漏斗、玻璃棒  5 b、C

       

      w.w.w.k.s.5.u.c.o.m

       

       

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