The Equilibrium Law (VCE SSCE Chemistry): Flashcards

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The Equilibrium Law
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Reaction quotient (QQ)

Ratio of product/reactant concentrations at any point in reaction

Equilibrium constant (KK)

Value of QQ when system reaches equilibrium

Relationship between QQ and KK at equilibrium

Q=KQ = K

General equilibrium law formula structure

rac{[ ext{products}]}{[ ext{reactants}]} with coefficients as powers

Role of coefficients in equilibrium expressions

They become the powers (indices) of concentrations

When Q<KQ < K, reaction shifts

Right, toward products

When Q>KQ > K, reaction shifts

Left, toward reactants

When Q=KQ = K, system is

At equilibrium, no net change

Products position in KK expression

Numerator (top)

Reactants position in KK expression

Denominator (bottom)

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