A student investigates how the proportion of tin affects the Brinell hardness of copper-tin alloys (bronze). The results are shown in Table 1.
Table 1
| Percentage by mass of tin in alloy (%) | Brinell hardness (HB) |
|---|---|
| 0 | 45 |
| 3 | 54 |
| 6 | 63 |
| 9 | 72 |
| 12 | 84 |
| 15 | 96 |
| 18 | 108 |
| 21 | 120 |
Determine the percentage by mass of copper in a copper-tin alloy with a Brinell hardness of 92 HB.
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.