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Characteristics of Equilibrium Constant

What is the e...

Question

What is the equilibrium expression for the reaction?
$P_{4 (s)} + 5 O_{2 (s)} ⇌ {P_{4} O}_{10 (s)}$

K = {[O_{2}]}^{5}

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K_{c} = \frac{[{P_{4} O}_{10}]}{5 [P_{4}] [O_{10}]}

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K_{c} = \frac{[{P_{4} O}_{10}]}{5 [P_{4}] {[O_{2}]}^{5}}

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K_{c} = \frac{1}{{[O_{2}]}^{5}}

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Solution

The correct option is D $K_{c} = \frac{1}{{[O_{2}]}^{5}}$
$K_{c} = \frac{1}{{[O_{2}]}^{5}}$

The concentration of solids is unity so it will not appear in the equilibrium expression.

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