H 3PO 4的pK a1=2．12，pK a2=7．2，pK a3=12．36。当pH=10时，磷酸溶液中的主要存在形式是（）。 -题库考试答案搜索网

H ₃PO ₄的pK _a1=2．12，pK _a2=7．2，pK _a3=12．36。当pH=10时，磷酸溶液中的主要存在形式是（）。

单选题

2021-07-17 23:50

A、H<sub>3</sub>PO<sub>4</sub>
B、H<sub>2</sub>PO<sub>4</sub><sup>-</sup>
C、HPO<sub>4</sub><sup>2-</sup>
D、PO<sub>4</sub><sup>3-</sup>

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正确答案

C

试题解析

标签：水文与水资源工程专升本水化学及水质分析 2019级毕业清考（考试分） 2019级第三学期期末考试

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