The table below shows three mixtures and four potential methods of separation.
Place a tick (✓\checkmark✓) in the correct box in each row of the table to show the most suitable method to separate the first named substance from each mixture.
| Substance to separate | Crystallisation | Filtration | Simple distillation | Fractional distillation |
|---|---|---|---|---|
| Lead(II) iodide from a mixture of lead(II) iodide and potassium nitrate solution | ||||
| Potassium nitrate crystals from potassium nitrate solution | ||||
| Pure water from potassium nitrate solution |
107 exam-style questions on Edexcel GCSE Chemistry 3.2 Methods of separating and purifying substances, covering 3.2.1 Pure substances and mixtures, 3.2.2 Techniques for separating mixtures, 3.2.3 Paper chromatography and Rf values, and 3.2.4 Making water potable. Each one has a worked solution and a mark scheme showing where the marks go.