An antique gold ring with a mass of 8.0 g was analysed and found to contain 5.0 g of pure gold.
Using the table below, determine the purity of the gold ring in carats.
| Percentage of gold in the alloy (%) | Purity of gold in carats |
|---|---|
| 37.5 | 9 |
| 50.0 | 12 |
| 62.5 | 15 |
| 75.0 | 18 |
| 87.5 | 21 |
| 100.0 | 24 |
Show your working.
97 exam-style questions on Edexcel GCSE Chemistry 6.1 Transition metals, alloys and corrosion, covering 6.1.1 Properties of transition metals, 6.1.2 Corrosion and its prevention, and 6.1.3 Alloys and the uses of metals. Each one has a worked solution and a mark scheme showing where the marks go.