Aluminium sulfate has the formula Al2(SO4)3\text{Al}_2\text{(SO}_4\text{)}_3Al2(SO4)3. It can be made by reacting aluminium oxide with dilute sulfuric acid.
Use the formula of aluminium sulfate to work out the charge on an aluminium ion. The charge on a sulfate ion is 2−2-2−.
The formula of the oxide ion is O2−\text{O}^{2-}O2−. Write the formula of aluminium oxide.
Write the balanced symbol equation for the reaction of aluminium oxide with dilute sulfuric acid.
The aluminium oxide is added to the dilute sulfuric acid until no more aluminium oxide reacts. Explain why.
Name the process used to obtain solid aluminium sulfate from the solution.
40 exam-style questions on AQA GCSE Chemistry 4.2 Reactions of acids, covering 4.2.1a Reactions of acids with metals, 4.2.1b Redox in acid-metal reactions, 4.2.2 Neutralisation of acids and salt production, 4.2.3 Soluble salts, 4.2.4 The pH scale and neutralisation, 4.2.5a Titrations, 4.2.5b Calculating quantities in titrations, and 4.2.6 Strong and weak acids. Each one has a worked solution and a mark scheme showing where the marks go.