题目内容
将50g20%氯化钾熔液稀释到200g,稀释后所得溶液中溶质质量分数是( )
A.1% | B.5% | C.10% | D.20% |
溶液稀释前后,溶质的质量不变,将50g20%氯化钾熔液稀释到200g,稀释后所得溶液中溶质质量分数是
×100%=5%.
故选B.
50g×20% |
200g |
故选B.
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(09广州)将50g20%氯化钾溶液稀释到200g,稀释后所得溶液中溶质的质量分数是( )
A.1% | B.5% | C.10% | D.20% |