Reaction Quotient (Q)

Rarely Tested

$$Q = \frac{[C]^c [D]^d}{[A]^a [B]^b}$$

Same form as $$K_c$$ but for any reaction stage. Predicts direction: $$Q \lt K$$ (β†’ forward), $$Q \gt K$$ (← reverse), $$Q = K$$ (equilibrium).

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