Question

某氯化鈉溶液中溶質(zhì)的質(zhì)量分?jǐn)?shù)為16%，它表示

1. A.
   100g水中溶解了16g氯化鈉
2. B.
   100mL氯化鈉溶液中氯化鈉占16g
3. C.
   100mL溶液中氯化鈉占16mL
4. D.
   100g氯化鈉溶液中含氯化鈉16g

Answer 1

D
分析：溶質(zhì)質(zhì)量分?jǐn)?shù)指溶液中溶質(zhì)的質(zhì)量分?jǐn)?shù)是溶質(zhì)質(zhì)量與溶液質(zhì)量之比．也指混合物中某種物質(zhì)質(zhì)量占總質(zhì)量的百分比，利用此知識(shí)可解決此題．
解答：溶質(zhì)質(zhì)量分?jǐn)?shù)指溶液中溶質(zhì)的質(zhì)量分?jǐn)?shù)是溶質(zhì)質(zhì)量與溶液質(zhì)量之比，氯化鈉溶液中溶質(zhì)的質(zhì)量分?jǐn)?shù)為16%的含義是每100g溶液中含有溶質(zhì)的質(zhì)量為16g
故選D
點(diǎn)評(píng)：此題是對(duì)溶質(zhì)質(zhì)量分?jǐn)?shù)的概念進(jìn)行的考查，主要要求學(xué)生掌握以下規(guī)律：
①溶質(zhì)的質(zhì)量分?jǐn)?shù)只表示溶質(zhì)質(zhì)量與溶液質(zhì)量之比值，并不代表具體的溶液質(zhì)量和溶質(zhì)質(zhì)量是多少．
②溶質(zhì)的質(zhì)量分?jǐn)?shù)一般用百分?jǐn)?shù)表示．
③溶質(zhì)的質(zhì)量分?jǐn)?shù)計(jì)算式中溶質(zhì)質(zhì)量與溶液質(zhì)量的單位必須統(tǒng)一．