下列说法正确的是(   )A.KW随溶液浓度的改变而改变B.Ksp只与

下列说法正确的是(   )

A.KW随溶液浓度的改变而改变

B.Ksp只与难溶电解质的性质和温度有关,而与溶液中的离子浓度无关

C.对已达到化学平衡的反应,改变压强,平衡常数(K)一定改变

D.一般情况下,一元弱酸HA的Ka越大,表明该酸的酸性越弱

 

答案

B

解析:水的离子积常数只与温度有关,A不正确。化学平衡常数与温度有关,而与压强无关,C不正确。电离常数越大,说明其电离程度越大,D不正确。答案是B。

 

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