室温时,CaCO3在水中的溶解平衡曲线如图所示,已知:25℃其溶度积

室温时,CaCO3在水中的溶解平衡曲线如图所示,已知:25℃其溶度积为2.8×109 mol2·L2,下列说法不正确的是

A. x数值为2×105

B. c点时有碳酸钙沉淀生成

C. 加入蒸馏水可使溶液由d点变到a

D. b点与d点对应的溶度积相等

答案

C

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