问题
选择题
将80g10%的NaOH溶液与20g15%的NaOH溶液混合,混合溶液中溶质的质量分数为( )
A.13%
B.12%
C.11%
D.16%
答案
混合溶液中溶质的质量分数为:
×100%=11%,故选 C.80g×10%+20g×15% 80g+20g
将80g10%的NaOH溶液与20g15%的NaOH溶液混合,混合溶液中溶质的质量分数为( )
A.13%
B.12%
C.11%
D.16%
混合溶液中溶质的质量分数为:
×100%=11%,故选 C.80g×10%+20g×15% 80g+20g