Practice Double Displacement in Chemistry

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

Quick Recap

A chemical reaction in which the positive ions (cations) of two ionic compounds in aqueous solution exchange partners, forming two new ionic compounds. The reaction is driven by the formation of a precipitate, a gas, or water.

Two couples swap partners at a dance — each positive ion pairs with the other's negative ion.

Example 1

easy
Write the balanced equation for the reaction between sodium chloride and silver nitrate solutions.

Example 2

medium
Predict the products and write the balanced equation: \text{BaCl}_2 + \text{Na}_2\text{SO}_4 \rightarrow ?

Example 3

easy
Classify: \text{HCl} + \text{NaOH} \rightarrow \text{NaCl} + \text{H}_2\text{O}.

Example 4

hard
When solutions of lead(II) nitrate and potassium iodide are mixed, a bright yellow precipitate forms. Write the balanced molecular equation, identify the precipitate, and explain how to predict which product is insoluble.
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