A student reacts magnesium oxide with dilute sulfuric acid. After the excess magnesium oxide has been removed, the student has magnesium sulfate solution in a beaker.
Four actions are used to obtain pure, dry magnesium sulfate crystals.
1 Leave the solution in a cool place for about a day
2 Pat the crystals dry between two pieces of filter paper
3 Heat the solution gently until crystals start to form at the edge
4 Remove the crystals from the liquid with a spatula
Which order of steps is correct?
3, 4, 1, 2
3, 4, 2, 1
1, 3, 4, 2
3, 1, 4, 2
88 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.