What is the equilibrium constant Keq for this reaction:aA+bB⇌cC+dD, if A and D are solids?
A
[C]c[D]d[A]a[B]b
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B
[A]a[B]b[C]c[D]d
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C
[C]c[B]b
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D
[C]c[D]d[A]a
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E
[A]a[B]b[C]c[D]d
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Solution
The correct option is B[C]c[B]b The equilibrium constant for the reaction aA+bB⇌cC+dD is K=[C]c[D]d[A]a[B]b. However, A and D are solids. Hence, their concentrations will not appear in the equilibrium constant expression. Hence, the equilibrium constant is K=[C]c[B]b.