Hydroxides for AQA A-level Chemistry

This page covers the following topics:

1. Sodium hydroxide reactions
2. Sodium hydroxide reactions

Dilute sodium hydroxide solution is used to test for some metal ions, which form insoluble metal hydroxides.

1

In ionic equations, what name is given to the ions that are not shown in the equation (i.e. ions that are not involved in the formation of the precipitate)?

spectator ions

2

Write a balanced ionic equation for the formation of iron(III) hydroxide precipitate.

Fe³⁺ + 3OH⁻ → Fe(OH)₃

3

Write a balanced equation for the reaction of copper sulphate with sodium hydroxide.

CuSO₄ + 2NaOH → Na₂SO₄ + Cu(OH)₂

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