将50g40%的硝酸钾溶液加水稀释到200g,稀释后所得溶液中溶质的质量分数是A:40% B:20% c:10% d:5%
问题描述:
将50g40%的硝酸钾溶液加水稀释到200g,稀释后所得溶液中溶质的质量分数是A:40% B:20% c:10% d:5%
答
选C.
将50g 40%的硝酸钾溶液溶质质量是50*40%=20g
稀释后所得溶液中溶质的质量分数=20/200*100%=10%