Practice Chemical Equilibrium in Chemistry

Use these practice problems to test your method after reviewing the concept explanation and worked examples.

Quick Recap

A dynamic state in a reversible reaction where the forward and reverse reactions proceed at equal rates, so the macroscopic concentrations of reactants and products.

The reaction is still happening both ways, but the amounts stay constant.

Example 1

easy
Explain what it means for a reaction to be at chemical equilibrium.

Example 2

medium
For the reaction \text{N}_2 + 3\text{H}_2 \rightleftharpoons 2\text{NH}_3, at equilibrium [\text{N}_2] = 0.50\,\text{M}, [\text{H}_2] = 1.50\,\text{M}, and [\text{NH}_3] = 0.60\,\text{M}. Calculate K_{eq}.

Example 3

medium
For \text{N}_2\text{O}_4 \rightleftharpoons 2\text{NO}_2, if additional \text{N}_2\text{O}_4 is added, which direction does the equilibrium shift? Apply Le Chatelier's principle.

Example 4

medium
At equilibrium in a reversible reaction, have the reactions stopped? Explain what is equal at equilibrium.
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