The Equilibrium Constant, Kc (AQA A-Level Chemistry): Quizzes

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The Equilibrium Constant, Kc
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What does the equilibrium constant KcK_c quantify?

Relative concentrations of reactants and products

For aA+bB⇌cC+dDaA + bB \rightleftharpoons cC + dD, what is the KcK_c expression?

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

In the KcK_c expression, what do the exponents represent?

Stoichiometric coefficients

What does Kc>1K_c > 1 indicate about equilibrium position?

Equilibrium lies to the right

What does Kc<1K_c < 1 indicate about the equilibrium?

Reactants favored

What defines a homogeneous equilibrium?

All species in same phase

In heterogeneous equilibria, which are omitted from KcK_c?

Solids and pure liquids

When is KcK_c unitless?

Moles of reactants = moles of products

For 2NO2(g)⇌N2O4(g)2NO_2(g) \rightleftharpoons N_2O_4(g), what is the KcK_c expression?

Kc=[N2O4][NO2]2K_c = \frac{[N_2O_4]}{[NO_2]^2}

If Kc=5.0K_c = 5.0 for 2NO2(g)⇌N2O4(g)2NO_2(g) \rightleftharpoons N_2O_4(g), what is favored?

Formation of N2O4N_2O_4

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Chemical Equilibria, Le Chatelier's Principle & Kc

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Oxidation, Reduction & Redox Equations

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Atomic Structure

Formulae, Equations & Calculations

The Mole, Avogadro & The Ideal Gas Equation

Types of Bonding & Properties

Molecules: Shapes & Forces

Energetics

Kinetics

Chemical Equilibria, Le Chatelier's Principle & Kc

Oxidation, Reduction & Redox Equations

Show more

Oxidation, Reduction & Redox Equations

Explore AQA A-Level Chemistry Flashcards by Topics

Atomic Structure

Formulae, Equations & Calculations

The Mole, Avogadro & The Ideal Gas Equation

Types of Bonding & Properties

Molecules: Shapes & Forces

Energetics

Kinetics

Chemical Equilibria, Le Chatelier's Principle & Kc

Oxidation, Reduction & Redox Equations

Show more

Oxidation, Reduction & Redox Equations

Explore AQA A-Level Chemistry Exam Questions by Topics

Atomic Structure

Formulae, Equations & Calculations

The Mole, Avogadro & The Ideal Gas Equation

Types of Bonding & Properties

Molecules: Shapes & Forces

Energetics

Kinetics

Chemical Equilibria, Le Chatelier's Principle & Kc

Oxidation, Reduction & Redox Equations

Show more

Oxidation, Reduction & Redox Equations

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