将_mol芒硝(na2so4·10h2o)溶于90ml水中,能使溶液中na+与H2O的微粒数之比为1:105

问题描述:

将_mol芒硝(na2so4·10h2o)溶于90ml水中,能使溶液中na+与H2O的微粒数之比为1:105

2x:(10x+5)=1:105
10x+5=210x
x=5/200=0.025mol