Required Practicals

• Describe a method to make pure, dry crystals of copper sulfate from a metal oxide and a dilute acid

  1. Use copper oxide and sulfuric acid
  2. Add sulfuric acid to a beaker and warm
  3. Add copper oxide with a spatula and stir
  4. Keep adding copper oxide until it is in excess
  5. Filter the mixture using filter paper and funnel to remove excess copper oxide
  6. Heat the solution in an evaporating basin until crystals begin to form
  7. Leave the solution to crystalise
  8. Pat dry with filter paper
• Describe the method of carrying out a titration to find the volume of sulfuric acid. The alkali used is sodium hydroxide.

  1. Use a pipette to transfer 25 cm^3 of sodium hydroxide solution into a conical flask
  2. Add 5 drops of an indicator into the conical flask
  3. Place conical flask onto a white tile - so that we can see a colour change more clearly
  4. Fill a burette with sulfuric acid
  5. Add acid to the alkali until the solution is neutral
  6. Once we start to see a colour change, add the acid drop by drop until the solution is neutral
  7. Swirl solution - so acid and alkali mix
  8. Read volume of acid from burette