EASY

AS and A Level

IMPORTANT

Earn 100

Calculate the value of $K_{c}$ for the following reaction using the information below: $H_{2} (g) + {CO}_{2} (g) ⇌ H_{2} O (g) + CO (g)$ .

Initial concentration of $H_{2} (g) = 10.00 mol {dm}^{- 3}$ .

Initial concentration of ${CO}_{2} (g) = 10.00 mol {dm}^{- 3}$ .

Equilibrium concentration of $CO (g) = 9.47 mol {dm}^{- 3}$ .

Important Questions on Equilibria

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>Questions

Nitrogen and hydrogen react together to form ammonia.

$N_{2} (g) + 3 H_{2} (g) ⇌ 2 {NH}_{3} (g)$ .

$0.1 mol$ of nitrogen and $0.1 mol$ of hydrogen were mixed in a closed container of volume $1 {dm}^{3}$ . At equilibrium $n mol$ ammonia is formed. What is the concentration of hydrogen at equilibrium?

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>Question>Q 9

Deduce the effect of increase in temperature on the value of

K_{c}

for the reaction:

2 {NO}_{2} (g) + O_{2} (g) ⇌ 2 NO (g); ∆ H_{r} = - 115 kJ {mol}^{- 1}

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>Question>Q 9

Explain why increasing the concentration of oxygen in this reaction does not affect the value of $K_{c}$ .

$O_{2} + NO \to {NO}_{2}$ .

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>Questions>Q 10

The reaction below was carried out at a pressure of $10.00 \times 10^{4} Pa$ and at constant temperature.

$N_{2} (g) + O_{2} (g) ⇌ 2 NO (g)$ .

The partial pressures of nitrogen and oxygen are both $4.85 \times 10^{4} Pa$ . Calculate the partial pressure of the nitrogen $(II)$ oxide, $NO (g)$ , at equilibrium.

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>Questions>Q 11

Deduce the units of

K_{p}

for the following reactions:

{PCl}_{5} (g) ⇌ {PCl}_{3} (g) + {Cl}_{2} (g)

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>Questions>Q 11

Deduce the units of

K_{p}

for the following reactions:

N_{2} (g) + 3 H_{2} (g) ⇌ 2 {NH}_{3} (g)

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>Questions>Q 11

Deduce the units of

K_{p}

for the following reactions:

3 Fe (s) + 4 H_{2} O (g) ⇌ {Fe}_{3} O_{4} (s) + 4 H_{2} (g)

EASY

AS and A Level

IMPORTANT

Chemistry for Cambridge International AS & A Level Coursebook with Digital Access (2 Years)>Chapter 8 - Equilibria>Questions>Q 13

When metallic mercury is shaken with a solution of mercury $(II)$ nitrate a solution of mercury $(I)$ nitrate is formed.

$Hg (l) + {Hg}^{2 +} (aq) ⇌ {Hg}_{2}^{2 +} (aq)$ .

What is the correct equilibrium expression for this reaction?

Calculate the value of Kc for the following reaction using the information below: H2(g)+CO2(g)⇌H2O(g)+CO(g). Initial concentration of H2(g)=10.00 mol dm-3. Initial concentration of CO2(g)=10.00 mol dm-3. Equilibrium concentration of CO(g)=9.47 mol dm-3.

Important Questions on Equilibria

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