A designer needs a flat panel with a volume of 500 cm3\mathrm{cm^{3}}cm3.
The panel must have a mass of less than 1.2 kg and a strength of at least 100 MPa.
| Material | Type of material | Density (g/cm3\mathrm{g/cm^{3}}g/cm3) | Strength (MPa) |
|---|---|---|---|
| Aluminium | metal | 2.7 | 300 |
| Glass | ceramic | 2.5 | 50 |
| Glass-reinforced plastic | composite | 1.9 | 200 |
| Poly(chloroethene) | polymer | 1.4 | 50 |
Which material should the designer choose?
Aluminium
Glass
Glass-reinforced plastic
Poly(chloroethene)
136 exam-style questions on OCR GCSE Chemistry 6.1 Improving processes and products, covering 6.1.1 Extracting metals industrially and by electrolysis, 6.1.2 Life cycle assessment and recycling, 6.1.3 Biological methods of metal extraction, 6.1.4 The Haber process and the production of fertilisers, 6.1.5 Alloys and their uses, 6.1.6 Corrosion and its prevention, 6.1.7 Comparing and selecting materials, and 6.1.8 Industrial conditions, rate and position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.