以 0.2mol.L -1 NaOH 溶液滴定 0.2mol.L -1 H 2 A ( PK a1 =2,PK a2 =9 ),化学计量点时的 PH 为()
A.
5.5
B.
6.5
C.
7.5
D.
8.5
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参考解析:
知识点:
皮皮学刷刷变学霸
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