A student is preparing a sample of hydrated nickel(II) sulfate crystals by reacting excess nickel(II) carbonate with warm dilute sulfuric acid. After gravity filtration to remove the unreacted solid, the student obtains a clear, emerald-green filtrate.
Describe the experimental procedure the student should follow to obtain a pure, dry sample of nickel(II) sulfate crystals from this filtrate.
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.