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【单选题】
向0.10 mol·L-1 HCl溶液中通H2S气体至饱和(0.10 mol·L-3),溶液中S2- 浓度为( ) (H2S: Ka1= 9.1 * 10-8, Ka2= 1.1 * 10-12)A.
1.0 * 10-18 mol·L -1
B.
1.1 *10-12 mol·L -1
C.
1.0 *10-19 mol·L -1
D.
9.5 * 10-5 mol·L -1
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