Equilibrium (OCR A-Level Chemistry A): Flashcards

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Controlling the Position of Equilibrium
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Only condition that changes KK value

Temperature

Meaning of K=1K = 1

Equilibrium halfway between reactants and products

Meaning of K=100K = 100

Equilibrium well in favour of products

Meaning of K=1×102K = 1 \times 10^{-2}

Equilibrium well in favour of reactants

Effect of increasing temp on exothermic reaction's KK

KK decreases

Effect of increasing temp on endothermic reaction's KK

KK increases

Effect of concentration increase on equilibrium

Shifts to reduce that concentration

Effect of pressure increase on equilibrium

Shifts to side with fewer gaseous moles

Effect of catalyst on KK value

No effect

Effect of catalyst on equilibrium position

No change; reaches equilibrium faster

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