Question

Hydrated Copper (II) Sulphate is heated in a boiling tube as shown.

1. State the colour of Copper (II) Sulphate before and after heating?
2. Explain why the boiling tube was slanted
3. How can the purity of the colourless liquid be confirmed?
4. Name another substance that can undergo the same change as hydrated Copper (II) Sulphate 

Answer 1

1. Before – blue
2. Avoid boiling tube cracking due to condensed water flowing back
3. Test its Bpt/Mpt/density
4. Any hydrated slat