C2.2.5-KS3

C2.2.5 Evaporation and distillation

Resource

Condenser

Condenser ANS

Video Resource

CopperSulphateCrystals.mp4

Evapouration

Obtaining copper sulphate crystals

Practical

C2.2.5 Evaporation and distillation


Demo : - Alcohol Demo

  • Distillation of "wine"
  • Condenser kit
  • Pure alcohol

Made to look like condenser has produced pure alcohol (some times not proof enough). Set fire to the Dissillate


Experiment: - Distillation of

  • 100 cm3 beaker
  • 100 cm3 conical flask
  • 25 cm3 measuring cylinder
  • Spatula
  • 15 cm glass stirring rod
  • 50–100 cm3 evaporating basin
  • Crystallising dish
  • Tongs
  • 65 mm diameter filter funnel
  • Filter paper
  • Pipeclay triangle
  • 0.5 mol/dm3 sulfuric acid (irritant), 20 cm3 in a small bottle
  • Copper(II) oxide (harmful, dangerous for the environment), about 1 g in a specimen tube


Risk assessment:

  • Goggles to be warn. :
  • Sulfuric acid (irritant at concentration used)
    • Copper(II) oxide (harmful, dangerous for the environment)

Ensure that students take care when adding copper oxide to the hot acid to avoid knocking over the beaker.



Risk assessment:

  • Alcohol contained (maybe do a bottle rocket)

Target:

• State some mixtures that can be separated using evaporation

• State some mixtures that can be separated using distillation

• Label distillation apparatus


• Explain how to use evaporation to separate mixtures

• Explain how distillation works

• Explain observations made during distillation of inky water


• Compare evaporation and distillation

• Discuss whether evaporation or distillation would be suitable for separating a mixture

• Consider the physical properties utilised during distillation when interpreting observations