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Characteristics of Equilibrium Constant

In the proces...

Question

In the process $I_{2} + I^{-} ⇌ I_{3}^{-}$ (in aq. medium) intially there are 2 mole $I_{2}$ and 2 mole I.But at equilibrium, due to addition of $A g N O_{3 (a q)}$ , 1.75 mole of yellow ppt is obtained. $K_{c}$ for the process is ( $V_{f l a s k} = 1 d m^{3}$ ) nearly

A

0.08

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B

0.02

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C

0.16

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D

0.12

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Solution

The correct option is B 0.16
The given reaction,

$I_{2} + I^{-} ⇄ I_{3}^{-}$

$2 M2 M_a t t = 0$

$(2 - x) M (2 - x) M x m o l_a t t = t^{'}$

Since,
Moles of $A g I =$ Moles of $I^{-}$ in solution

$∴ {[I^{-}]}_{e q m} = 1.75 M$
$2 - x = 2$

$∴ x = 1$

Equilibrium constant of the reaction at equilibrium,

$K = \frac{X}{(2 - x) (2 - x)}$

$K = \frac{1}{0.25 \times 0.25} = 16$

Given that,

$V_{f l a s k} = 1 d m^{3}$
$K = \frac{16}{100} = 0.16$

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Similar questions

I_{2} + I^{-} ⇌ I_{3}^{-}

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