题目内容：

某硫酸铝溶液中,c(AL3+)和c(SO42-)总浓度为0.1mol/l,则该铝盐的物质的量浓度

优质解答

assume [Al3+]= x.then [So42-]= (3/2)x
so
x + (3/2)x = 0.1
hence
x= 0.2/5 = 0.04 M
and the apparent concentration of Al2(SO4)3 will be
(1/2)x = 0.02 M