In alkaline solution- the following equilibria exist-a- S2-S- S22- equilibrium constant K1b- S22-S- S32- equilibrium constant K2 K1 and K2 have values 12 and 11- respectively- S32- S2-2S- What is equilibrium constant for the reaction

The correct option is B 7.58× 10^ 3 i. S^2 +S→ S_2^2 ...... K_1 ii. S_2^2 +S→ S_3^2 ...... K_2 The required reaction is:iii. S_ ...

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Standard XII

Chemistry

Reaction Quotient

In alkaline s...

Question

In alkaline solution, the following equilibria exist:
a. $S^{2 -} + S \to S_{2}^{2 -}$ equilibrium constant $K_{1}$
b. $S_{2}^{2 -} + S \to S_{3}^{2 -}$ equilibrium constant $K_{2}$
$K_{1}$ and $K_{2}$ have values 12 and 11, respectively.
$S_{3}^{2 -} \to S^{2 -} + 2 S$ . What is equilibrium constant for the reaction

132

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7.58 \times 10^{- 3}

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1.09

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0.918

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Solution

The correct option is B $7.58 \times 10^{- 3}$
i. $S^{2 -} + S \to S_{2}^{2 -}$ ...... $K_{1}$
ii. $S_{2}^{2 -} + S \to S_{3}^{2 -}$ ...... $K_{2}$

The required reaction is:
iii. $S_{3}^{2 -} \to S^{2 -} + 2 S$ ,

Since eq. (iii) is obtained by reversing and adding equations (i) and (ii).
Hence, $K = \frac{1}{K_{1} \times K_{2}} = \frac{1}{12 \times 11} = 7.58 \times 10^{- 3}$

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Similar questions

Q. In an alkaline solution, the following equilibria exist.

S^{2 -} + S \to S_{2}^{2 -}

equilibrium constant

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S_{2}^{2 -} + S \to S_{3}^{2 -}

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equilibrium constant

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Q. Sulphide ions in alkaline solution react with solid sulphur to form polyvalent sulphide ions. The equilibrium constant for the formation of

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Sulphide ions in alkaline solution react with solid sulphur to form polyvalent sulphide ions. The equilibrium constant for the formation of $S_{2}^{2 -}$ and $S_{3}^{2 -}$ from S and $S^{2 -}$ ions are 1.7 and 5.3 respectively. Equilibrium constant for the formation of $S_{3}^{- 2}$ from S is:

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In alkaline solution, the following equilibria exist:a. S2−+S→S2−2 equilibrium constant K1b. S2−2+S→S2−3 equilibrium constant K2K1 and K2 have values 12 and 11, respectively.S2−3→S2−+2S. What is equilibrium constant for the reaction

The correct option is B 7.58×10−3i. S2−+S→S2−2 ......K1ii. S2−2+S→S2−3...... K2The required reaction is:iii. S2−3→S2−+2S,Since eq. (iii) is obtained by reversing and adding equations (i) and (ii).Hence, K=1K1×K2=112×11=7.58×10−3