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In alkaline solution, the following equi...

In alkaline solution, the following equilibria exist
a. `S^(2-)+S rarr S_(2)^(2-)` equilibrium constant `K_(1)`
b. `S_(2)^(2-)+S rarr S_(3)^(2-)` equilibrium constant `K_(2)`
`K_(1)` and `K_(2)` have values `12` and `11`, respectively.
`S_(3)^(2-) rarr S^(2-)+2S`. What is equilibrium constant for the reaction

A

`132`

B

`7.58xx10^(-3)`

C

`1.09`

D

`0.918`

Text Solution

Verified by Experts

The correct Answer is:
B
i. `S^(2-)+S rarr S_(2)^(2-) …k_(1)`
ii. `S_(2)^(2-)+S rarr S_(3)^(2-) …k_(2)`
The equation constant for the reaction,
iii. `S_(3)^(2-) rarr S^(2-)+2S`,
Since eq. (iii) is obtained by reversing and adding equations (i) and (ii).
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