题目内容

以下表述中错误的是 ( )

A. H2O作为酸的共轭碱是OH-
B. H2O作为碱的共轭酸是H3O+
C. 因为HAc的酸性强,故HAc的碱性必弱
D. HAc的碱性弱,则H2Ac+的酸性强

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A. 增大
B. 减小
C. 无影响
D. 减小至一定程度后趋于稳定

A. [H3AsO4] = [H2AsO4-]
B. [H2AsO4-] = [HAsO42-]
C. [HAsO42-] >[H2AsO4-]
D. [H3AsO4] >[HAsO42-]

A. [H3PO4] = [H2PO4-]
B. [H2PO4-] = [HPO42-]
C. [H3PO4] = [HPO42-]
D. [H3PO4] = 2[PO43-]

A. [H+] = [OH-]+[Cl-]+[SO42-]
B. [H+]+0.3 = [OH-]+[SO42-]
C. [H+]-0.3 = [OH-]+[SO42-]
D. [H+]-0.3 = [OH-]+[SO42-]+[HSO4-]