常温下,Ksp(CaSO4)=9×10-6,常温下CaSO4在水中的沉淀溶解平衡曲线

常温下,KspCaSO4=9×106,常温下CaSO4在水中的沉淀溶解平衡曲线见图。下列说法正确的是(  

A.常温下CaSO4饱和溶液中,cCa2+)、cSO42—)对应于曲线上任意一点

Bb点将有沉淀生成,平衡后溶液中c(SO42—)等于3×103 mol·L—1

Cd点溶液通过蒸发可以变到c

Da点对应的Ksp等于c点对应的Ksp

答案

D

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