Hydrated Copper (II) Sulphate is heated in a boiling tube as shown.
![ChemF2midt1q16](https://www.easyelimu.com/images/form_2_past_papers/mid_term_2021/chemf2mid/ChemF2midt1q16.PNG)
- State the colour of Copper (II) Sulphate before and after heating?
- Explain why the boiling tube was slanted
- How can the purity of the colourless liquid be confirmed?
- Name another substance that can undergo the same change as hydrated Copper (II) Sulphate