Five Steps for the Purification of Water

• What is the first step in the purification of water?

  Test the pH of the water sample
• Why should a pH meter be used instead of an indicator?

  Indicator will contaminate the sample
• What should be done if the pH of the water sample is not 7?

  Neutralise the sample with acid or alkali
• What is the target pH level for neutral water?

  7
• What happens during the distillation of water?

  Water boils and travels to the condenser
• What is the role of the condenser in distillation?

  It cools vapour back into liquid
• What is left in the flask after distillation?

  Any dissolved salts
• What is the final step in the purification process?

  Retest the pH of the distilled water
• Why is it important to retest the pH of distilled water?

  To check if it's neutral
• What are the five steps for the purification of water?

  1. Test the pH of the water sample.
  2. Neutralise the sample if needed.
  3. Distil the sample.
  4. Check for salts.
  5. Retest the pH of distilled water.