An aqueous solution contains 0.10 M H_2S and 0.20 M HCl If the equilibrium constant for the formation of HS^{-} from H_2S is 1.0\times10^{-7} and that of S^{2-} from HS^{-} ions is 1.2\times10^{-13} then the concentration of S^{2-} ions in aqueous solution is: [Main 8 April 2018]

JEE Main 08 Apr 2018 Code A Solved Paper

Section: Chemistry

Question : 37 of 90

Marks: +1, -0

An aqueous solution contains 0.10 M H2S and 0.20 M HCl If the equilibrium constant for the formation of HS− from H2S is 1.0×10−7 and that of S2− from HS− ions is 1.2×10−13 then the concentration of S2− ions in aqueous solution is:

[Main 8 April 2018]

5×10−8
3×10−20
6×10−21
5×10−19

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