A water testing laboratory uses solubility rules to predict which compounds form precipitates.
The table shows four compounds.
| Letter | Compound |
|---|---|
| A | sodium sulfate |
| B | silver chloride |
| C | ammonium carbonate |
| D | copper hydroxide |
Give the letters of the two compounds in the table that are insoluble in water.
A technician mixes lead nitrate solution with sodium sulfate solution. A white precipitate forms.
Name the white precipitate.
Name the other product, which stays dissolved in the solution.
Describe how the technician can obtain a pure, dry sample of the precipitate from the mixture.
The technician mixes potassium nitrate solution with sodium chloride solution. Predict whether a precipitate forms. Explain your answer.
44 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.