An analyst has three unlabeled jars containing different solids: Solid X, Solid Y, and Solid Z.
The solids are known to be zinc powder, copper(II) carbonate, and magnesium oxide, but the jars are not labeled.
The analyst reacts a sample of each solid with dilute sulfuric acid.
| Reaction with dilute sulfuric acid | Gas bubbled through limewater | Gas tested with a lit splint | |
|---|---|---|---|
| Solid X | Green solid dissolves, blue solution formed, bubbles seen | Limewater turns cloudy | Puts out lit splint |
| Solid Y | Grey solid dissolves, colourless solution formed, bubbles seen | No change | Squeaky pop |
| Solid Z | White solid dissolves, colourless solution formed, no bubbles | No gas produced | No gas produced |
Use the observations and results in Table 1 to identify each solid. Your answer should include:
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.