Question

家里腌咸蛋時，通常用的浸蛋液是在每1000克水中溶解350克食鹽，求浸蛋液中食鹽的質(zhì)量分數(shù)．

Answer 1

考點：有關(guān)溶質(zhì)質(zhì)量分數(shù)的簡單計算

專題：溶液的組成及溶質(zhì)質(zhì)量分數(shù)的計算

分析：把350g食鹽完全溶解在1000g水中，所得溶液中溶質(zhì)的質(zhì)量為350g，而溶液質(zhì)量為（350+1000）g=1350g，利用質(zhì)量分數(shù)計算式，計算所得溶液中溶質(zhì)質(zhì)量分數(shù)．

解答：解：所得溶液中溶質(zhì)的質(zhì)量分數(shù)=

350g

350g+1000g

×100%=25.9%
答：所得溶液溶質(zhì)質(zhì)量分數(shù)為25.9%．

點評：根據(jù)溶液中溶質(zhì)的質(zhì)量分數(shù)的概念，溶液的溶質(zhì)質(zhì)量分數(shù)=

溶質(zhì)質(zhì)量

溶液質(zhì)量

×100%，不可把溶液質(zhì)量誤用為溶劑質(zhì)量．