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81对于一元弱酸溶液,若采用最简式计算其pH,则需满足的条件有( )

单选题
2021-09-06 21:09
A、Kaca≥20Kw
B、Kaca≤20Kw,且 ca/Ka≤500
C、Kaca≥20Kw,且ca/Ka≤500
D、Kaca≤20Kw,且ca/Ka≥500
E、Kaca≥20Kw,且 ca/Ka≥500
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正确答案
E

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