Question

將50g20%氯化鉀熔液稀釋到200g，稀釋后所得溶液中溶質(zhì)質(zhì)量分數(shù)是

1. A.
   1%
2. B.
   5%
3. C.
   10%
4. D.
   20%

Answer 1

B
分析：根據(jù)溶液稀釋前后，溶質(zhì)的質(zhì)量不變，結(jié)合溶質(zhì)質(zhì)量=溶液質(zhì)量×溶質(zhì)的質(zhì)量分、溶質(zhì)質(zhì)量分數(shù)=100%，進行分析解答．
解答：溶液稀釋前后，溶質(zhì)的質(zhì)量不變，將50g20%氯化鉀熔液稀釋到200g，稀釋后所得溶液中溶質(zhì)質(zhì)量分數(shù)是100%=5%．
故選B．
點評：本題難度不大，掌握溶液稀釋前后溶質(zhì)的質(zhì)量不變、溶質(zhì)質(zhì)量分數(shù)的有關(guān)計算是正確解答本題的關(guān)鍵所在．