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Derivation of Kp and Kc

If fraction '...

Question

If fraction 'a' of HI dissociates at equilibrium in the reaction $2 H I ⇋ H_{2} + I_{2}$ then starting with 2 moles of Hl, the total number of moles of the reactants and prodcucts at equilibrium is equal to

A

1

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B

1 +a

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C

2

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D

2+a

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Solution

The correct option is C 2
$2 H I (g) ⇌ H_{2} (g) + I_{2} (g)$
Initial $2$ $-$ $-$
At eq. $2 - 2 α$ $α$ $α$

total mole of reactant & product at equlibrium
$= 2 - 2 α + α + α = 2$

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Derivation of Kp and Kc

Standard XI Chemistry

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