将硫酸钾、硫酸铝、硫酸铝钾三种盐混合溶于硫酸酸化的水中,测得

将硫酸钾、硫酸铝、硫酸铝钾三种盐混合溶于硫酸酸化的水中,测得c(SO42-)= 0.105mol·L-1c(Al3)=0.055mol·L-1,溶液的pH=2.0,则c(K)约为(    )

A.0.045mol·L-1      B.0.035mol·L-1     C.0.055mol·L-1   D.0.040mol·L-1

 

答案

B

解析:略

 

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