A student has a solution of sulfuric acid, H2SO4\text{H}_2\text{SO}_4H2SO4, and a solution of potassium hydroxide, KOH\text{KOH}KOH.
He wants to make a pure, dry sample of potassium sulfate, K2SO4\text{K}_2\text{SO}_4K2SO4.
Describe how he can do this.
Include the apparatus he should use and his method.
Write a balanced symbol equation for the reaction.
The student also investigates other reactions.
The table below shows the salts he can make from different starting materials. Complete the table:
| Acid used | Other starting material | Salt made |
|---|---|---|
| Hydrochloric acid | Calcium carbonate | (i) ................................................ |
| (ii) ................................................ | Zinc oxide | Zinc nitrate |
| Sulfuric acid | (iii) ................................................ | Magnesium sulfate |
What type of reaction happens when nitric acid reacts with zinc oxide?