A garden centre sells products that contain ionic compounds.
The table shows the compounds in four of these products.
| Product | Formula of compound | Name of compound |
|---|---|---|
| plant food | KNO3\mathrm{KNO_{3}}KNO3 | potassium nitrate |
| garden lime | CaCO3\mathrm{CaCO_{3}}CaCO3 | calcium carbonate |
| path de-icer | MgCl2\mathrm{MgCl_{2}}MgCl2 | |
| lawn treatment | FeSO4\mathrm{FeSO_{4}}FeSO4 |
Give the name of the compound in the path de-icer.
The names potassium nitrate and calcium carbonate both end in -ate. State what the ending -ate tells you about these compounds.
Give the total number of atoms shown in the formula CaCO3\mathrm{CaCO_{3}}CaCO3.
Garden lime contains calcium ions, Ca2+\mathrm{Ca^{2+}}Ca2+, and carbonate ions, CO32−\mathrm{CO_{3}^{2-}}CO32−. Explain why the formula of calcium carbonate contains one of each ion.
The lawn treatment contains Fe2+\mathrm{Fe^{2+}}Fe2+ ions. Give the name of the compound in the lawn treatment.
Sodium oxide contains sodium ions, Na+\mathrm{Na^{+}}Na+, and oxide ions, O2−\mathrm{O^{2-}}O2−. Give the formula of sodium oxide.
56 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.