Simple Distillation

• What is the purpose of crystallization in the context of separating substances?

  To separate a dissolved solid from a liquid
• What is a solution in water called?

  Aqueous solution
• What happens to the water when a sodium chloride solution is gently heated?

  The water evaporates, leaving behind sodium chloride crystals
• What is the main problem with crystallization if we want to keep the liquid?

  Crystallization does not allow us to retain the liquid
• What is the first stage of simple distillation?

  Evaporating the liquid by heating
• What is the second stage of simple distillation?

  Condensing the vapor back to a liquid by cooling
• What apparatus is used in simple distillation?

  • Flask for the solution
  • Continuous glass tube
  • Condenser surrounded by cold water
  • Thermometer
• How does the condenser work during simple distillation?

  The condenser keeps the internal glass tube cold to condense the vapor
• What happens to the thermometer reading during simple distillation?

  The thermometer reading increases as the liquid evaporates
• What is the result of simple distillation?

  Crystals of solid in the flask and liquid in the beaker
• Why is simple distillation not commonly used to produce drinking water from seawater?

  It requires a great deal of energy
• What is the difference between simple distillation and fractional distillation?

  • Simple distillation: separates liquids with significantly different boiling points
  • Fractional distillation: separates liquids with closer boiling points
• Where can students find more questions on the topic of simple distillation?

  In the vision workbook linked in the video