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【单选题】
某二元弱酸 H 2 A 的 Ka=6 × 10 -8 ,Ka=8 × 10 -14 , 若其浓度为 0.05mol · dm -3 , 则溶液中 A 2- 浓度约为
A.
6×10 -8 mol.dm -3
B.
8×10 -14 mol.dm -3
C.
3×10 -8 mol-dm -3
D.
4×10 -14 mol·dm -3
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相关题目：
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demanded
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advised
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