Required Practicals

• Making Soluble Salts

  1. Start with a fixed amount of DILUTE SULFURIC ACID
  2. Gently heat the acid
  3. Use a spatula to add small amounts of copper oxide to acid -> then stir
  4. Continue adding copper oxide until it's in excess -> At this point the reaction has stopped and all the acid has reacted
  5. Use filtration to remove unreacted copper oxide
  6. Place copper sulfate solution in an evaporating basin and heat gently over the beaker with boiling water
  7. Leave the solution of 24 hours in a cool place for crystals to form
  8. Scrape crystals on paper towel and gently pat them dry
• Electrolysis (Copper Chloride)

  1. Pour 50 cm CUBED of copper chloride solution into a beaker
  2. Add a lid on top of the beaker with 2 holes
  3. Insert a carbon graphite rod into each hole -> These are our inert electrodes)
  4. Add crocodile leads to the rods and connect to the terminal of a low-voltage power supply (4 V) and turn on
  5. Hold a piece of damp blue litmus paper near the anode (If bleached, that confirms the gas in chlorine)
• Electrolysis (Sodium Chloride)

  1. Pour 50 cm CUBED of sodium chloride solution into a beaker
  2. Add a lid on top of the beaker with 2 holes
  3. Insert a carbon graphite rod into each hole -> These are our inert electrodes)
  4. Add crocodile leads to the rods and connect to the terminal of a low-voltage power supply (4 V) and turn on
  5. Hold a piece of damp blue litmus paper near the anode -> The gas produced (chlorine) bleaches the damp blue litmus paper