某二元酸(化学式H2A)在水中的电离方程式是H2A→ H+ + HA-、HAH++A2-

某二元酸(化学式H2A)在水中的电离方程式是H2A→ H+ + HA、HAH++A2又知0.1 mol/L NaHA溶液的pH = 2。则下列说法不正确的是…………………(   )

A、因为A2+H2O  HA+OH,所以Na2A溶液显碱性

B、0.1 mol/L H2A溶液中氢离子的物质的量浓度为0.11 mol/L

C、NaHA溶液中各种离子浓度的关系是c(Na+ ) > c(HA) > c(H+) > c(A2) > c(OH

D、在NaHA溶液中,HA电离的趋势大于其水解的趋势

 

答案

B、D

解析:略

 

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