Question

4．在80°C時(shí)，硝酸鈉的溶解度是150g，此時(shí)飽和硝酸鈉的溶質(zhì)的質(zhì)量分?jǐn)?shù)是60%．

Answer 1

分析 根據(jù)飽和溶液中溶質(zhì)質(zhì)量分?jǐn)?shù)=$\frac{溶解度}{溶解度+100g}$×100%，進(jìn)行分析解答．

解答 解：飽和溶液中溶質(zhì)質(zhì)量分?jǐn)?shù)=$\frac{溶解度}{溶解度+100g}$×100%，在80°C時(shí)，硝酸鈉的溶解度是150g，此時(shí)飽和硝酸鈉的溶質(zhì)的質(zhì)量分?jǐn)?shù)是$\frac{150g}{150g+100g}$×100%=60%．
故答案為：60%．

點(diǎn)評(píng) 本題難度不大，掌握飽和溶液中溶質(zhì)質(zhì)量分?jǐn)?shù)=$\frac{溶解度}{溶解度+100g}$×100%是正確解答本題的關(guān)鍵．