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An aqueous solution contains 0.10 M H(2)...

An aqueous solution contains 0.10 M `H_(2)S` and 0.20 M HCl. If the equilibrium constants for the formation of `HS^(-)` from `H_(2)S` is `1.0xx10^(-7)` and that `S^(2_)` from `HS^(-)` ions is `1.2xx10^(-13)` then the concentration of `S^(2-)` ions in aqueous solution is :

A

`5xx10^(-19)`

B

`5xx10^(-8)`

C

`3xx10^(-20)`

D

`6xx10^(-21)`

Text Solution

Verified by Experts

The correct Answer is:
C
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