water

• What is potable water?

  Water that is safe to drink
• How does pure water differ from potable water?

  Pure water has no dissolved solids
• What is the pH of pure water?

  7
• What does a pH not equal to seven indicate?

  The water contains dissolved acid or alkali
• How do you check the pH of water?

  Using universal indicator paper
• What does an increase in mass of the evaporating basin indicate?

  The water contained dissolved solids
• What happens to dissolved solids when water evaporates?

  They form crystals on the basin's surface
• What is the first step in testing water purity?

  Check the pH of the water
• What is the purpose of distillation in water purification?

  To remove dissolved solids from water
• What equipment is used for distilling water?

  • Conical flask
  • Delivery tube
  • Test tube
  • Ice and water beaker
• What happens to water when it is heated during distillation?

  It evaporates and forms water vapor
• What is distilled water?

  Water with no dissolved solids
• What is the pH of distilled water?

  7
• How does the process of distillation ensure water purity?

  It separates water from dissolved impurities
• What are the steps to purify water by distillation?

  1. Heat water in a conical flask
  2. Water evaporates into vapor
  3. Vapor travels through a delivery tube
  4. Vapor condenses in a cold test tube
  5. Collect distilled water