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【单选题】
某二元弱酸 H 2 A 的 K a1 = 6x10 -8 , K a2 = 8 * 10 -14 , 若其浓度为 0.05 mol.L -1 ,则溶液 A 2- 浓度约为( )A.
6 * 10 -8 mol.L -1
B.
8 * 10 -14 mol.L -1
C.
3 * 10 -8 mol.L -1
D.
4 * 10 -14 mol.L -1
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举一反三
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