题目内容：

VmlAl2(SO4)3溶液中含agAl3+,取V/4mlg该溶液稀释到4Vml,则该稀释溶液中SO42-的浓度是如题

优质解答

n(AL3+)=a/27mol n(SO42-)=a/27/2*3=a/18mol n`=a/18*(1/4)=a/72mol c=n/v=a/72mol/(4*0.001)L=(125/36)*a/v mol