A student determined the precise volume of dilute sulfuric acid required to neutralise 20.0 cm3 of sodium hydroxide solution via titration.
The student then combined this exact volume of dilute sulfuric acid with 20.0 cm3 of the sodium hydroxide solution in a clean beaker, ensuring no indicator was present.
Devise a practical method to obtain a pure, dry sample of sodium sulfate crystals from this neutralised solution.
276 exam-style questions on Edexcel GCSE Chemistry 4.1 Acids, covering 4.1.1 Acids, alkalis and the pH scale, 4.1.2 Hydrogen ion concentration and pH, 4.1.3 Dilute and concentrated, weak and strong acids, 4.1.4 Bases, alkalis and the reactions of acids, 4.1.5 Chemical tests for hydrogen and carbon dioxide, 4.1.6 Neutralisation as a reaction of acids with bases, 4.1.7 Preparing soluble salts, and 4.1.8 Solubility rules and preparing insoluble salts. Each one has a worked solution and a mark scheme showing where the marks go.