What is the equilibrium constant expression for PCl₅ ⇌ PCl₃ + Cl₂?

Question

Accepted Answer

K = [PCl₃][Cl₂] / [PCl₅]

Answer

K = [PCl₅] / [PCl₃][Cl₂]

Answer

K = [PCl₃] + [Cl₂] / [PCl₅]

Answer

K = 2[PCl₃][Cl₂] / [PCl₅]

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