Paper 1 Required Practicals

Question 1

What is a salt composed off?

Answer 1

Negative and positive ion

Question 2

What equipment is used for the first stage of the making solubke salts practical?

Answer 2

• beaker
• tripod
• gauze
• heat proof mat
• bunsen burner

Question 3

Process of making soluble salts?

Answer 3

1. Fixed volume of dilute sulphuric acid . This is limiting reactant
2. Gently heat acid until almost boiling
3. Use spatula to add small amounts of copper oxide to acid , stir solution with glass rod. The copper oxide will react and seem to disappear. Continue adding copper oxide if the solution stays clear blue. Stop adding if some powder remains after stirring
4. At this point reaction has stopped . All of the acid has reacted
5. Use filtration to remove the unreacted copper oxide
6. Place remaining solution in evaporating basin. Heating gently over a beaker of boiling water. Heat until half the solution remains
7. Leave solution for 24 hours , in a cool place for crystals to form
8. Scrape crystals onto paper towel and gently pat them dry, leaving dry crystals