A vessel operates at 1500 ∘C1500\,^{\circ}\mathrm{C}1500∘C. Its lining must remain solid at this temperature.
The table gives information about three possible lining materials.
| Compound | Ions present | Melting point (∘C^{\circ}\mathrm{C}∘C) |
|---|---|---|
| rubidium chloride | Rb+\mathrm{Rb^{+}}Rb+ and Cl−\mathrm{Cl^{-}}Cl− | 718 |
| strontium chloride | Sr2+\mathrm{Sr^{2+}}Sr2+ and Cl−\mathrm{Cl^{-}}Cl− | 874 |
| strontium oxide | Sr2+\mathrm{Sr^{2+}}Sr2+ and O2−\mathrm{O^{2-}}O2− | 2531 |
Explain which compound should be selected as the lining material. Use the data and your knowledge of ionic bonding.
119 exam-style questions on Edexcel GCSE Chemistry 2.3 Ionic bonding, covering 2.3.1 Ions and the formation of ionic bonds, 2.3.2 Naming and deducing formulae of ionic compounds, and 2.3.3 Giant ionic lattices. Each one has a worked solution and a mark scheme showing where the marks go.