V mLAl2(SO4)3溶液中含有Al3+ a g,取V mL溶液稀释到4V mL,则稀释后溶液中

V mLAl2(SO4)3溶液中含有Al3+ a g,取V mL溶液稀释到4V mL,则稀释后溶液中S042的物质的量浓度是(    

Amol/L                   Bmol/L      

Cmol/L                   Dmol/L

答案

C

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