rp11

• What is the purpose of Required Practical 11 in AQA Chemistry A-level?

  To identify transition metal ions in aqueous solution
• What are the steps involved in Test 1a?

  1. Place 10 drops of solution in a test tube.
  2. Add sodium hydroxide solution dropwise until in excess.
  3. Record any observations.
  4. Do not discard the mixture.
• How should the sodium hydroxide solution be added in Test 1a?

  Dropwise until in excess
• What should be done after completing Test 1a?

  Allow the test tubes to stand in hot water
• What are the steps involved in Test 1b?

  1. Half fill a 250 cm³ beaker with freshly boiled water.
  2. Place the four test tubes from Test 1a in the beaker.
  3. Allow to stand for about 10 minutes.
  4. Record any observations.
• How long should the test tubes stand in the hot water during Test 1b?

  About 10 minutes
• What are the steps involved in Test 2?

  1. Place about 10 drops of sodium carbonate solution in a test tube.
  2. Add about 10 drops of solution.
  3. Shake the mixture gently.
  4. Record any observations.
• What should be added to the test tube in Test 2 along with sodium carbonate solution?

  About 10 drops of solution
• What are the steps involved in Test 3?

  1. Place about 10 drops of solution in a test tube.
  2. Add about 10 drops of silver nitrate solution.
  3. Shake the mixture gently.
  4. Allow to stand for about 10 minutes.
  5. Record any observations.
• What should be added to the test tube in Test 3 along with the solution?

  About 10 drops of silver nitrate solution
• How long should the test tubes stand after adding silver nitrate in Test 3?

  About 10 minutes
• What should be done after each test in the practical?

  • Record any observations.
  • Do not discard the mixtures until instructed.