Equilibrium Constant (HSC SSCE Chemistry): Flashcards

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Equilibrium Constant
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Definition of equilibrium constant (KeqK_{eq})

Ratio of product to reactant concentrations at equilibrium

Symbols for equilibrium constant

KK, KeqK_{eq}, or KcK_c

Products placement in KeqK_{eq} expression

In the numerator (top)

Stoichiometric coefficients in KeqK_{eq} expression

Used as exponents for each concentration

Species excluded from equilibrium expressions

Pure solids and liquids in heterogeneous systems

Reaction quotient (QQ)

Same as KeqK_{eq} but for any mixture, not just equilibrium

Meaning when Q<KeqQ < K_{eq}

Forward reaction is favoured

Interpretation of large KeqK_{eq} (>> 1)

Equilibrium favours products (lies to right)

Interpretation of small KeqK_{eq} (<< 1)

Equilibrium favours reactants (lies to left)

KreverseK_{reverse} in terms of KforwardK_{forward}

Kreverse=1KforwardK_{reverse} = \frac{1}{K_{forward}}

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Qualitative Equilibrium

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Qualitative Equilibrium

Calculating the Equilibrium Constant

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Qualitative Equilibrium

Calculating the Equilibrium Constant

Solution Equilibria

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