Water

• What is the first step required for practical water analysis?

  Check the pH of the water
• How should you weigh an empty basin for water analysis?

  Use a balance to weigh the empty basin
• What should you do after filling the evaporating basin with a water sample?

  Place it on a tripod and gauge
• What is the purpose of using a bunsen burner in water analysis?

  To gently heat the water until evaporated
• What should you do after the water has evaporated in the analysis process?

  Weigh the evaporating basin again
• What happens to the mass of the evaporating basin if dissolved solids are present in the water?

  The mass will increase after evaporation
• What method is used to purify water in the study material?

  Distillation
• What is the role of heat in the distillation process of water purification?

  It causes the water to evaporate
• What happens to water during the distillation process?

  It evaporates and forms steam
• What occurs when water vapor travels along a collecting tube?

  It condenses back into liquid water
• What happens to the water vapor when it enters the cold test tube?

  It condenses back into liquid water
• What is the final product of the distillation process described?

  Distilled water
• Why is distilled water considered pure?

  It is free from dissolved solids
• How does the presence of dissolved solids affect the mass of the evaporating basin?

  It increases the mass after evaporation