19. Synthesis of a liquid organic product

  • 00:25 Why is it necessary to work in a fume cupboard?
  • 00:34 Why is it better to use a stopper or plug?
  • 00:37 Why cool the acid?
  • 00:41 What is the role of the calcium chloride?
  • 00:47 What type of reaction is occurring?
  • 01:27 What is contained in the aqueous layer?
  • 01:37 What is the role of the hydrogencarbonate?
  • 01:43 What causes the froth?
  • 01:54 What do you know about the comparative density of the upper layer?
  • 02:10 What is the role of the magnesium sulfate?
  • 02:15 Why does the milky colour disappear after adding the magnesium sulfate?
  • 02:20 What could happen if too much magnesium sulfate is added? 
  • 02:55 What is the stoichiometry of the reaction?
  • de-ionised water

  • digital balance (2 decimal-place)

  • 100 cm3 round-bottomed flask

  • 100 cm3 conical flask

  • 100 cm3 conical flask with stopper

  • 50 cm3 measuring cylinder

  • 10 cm3 measuring cylinder

  • 50 cm3 separating funnel

  • ice-bath

  • reflux condenser

  • thermometer

  • sample vial

  • labels / fine-tipped permanent marker

  • anti-bumping granules

  • heating-mantle / Bunsen burner with water-bath

  • clamp-stand

  • filter-funnel with cotton wool

Hazard Risk Control measure

(CH3)3COH – flammable, irritant.

Vapour could ignite when close to flame. Contact with eyes. Could be inhaled.

Extinguish flames using fireblanket. Cool burnt skin under tap. Eye: flood with tap water (10min). See doctor. Inhalation of vapour: seek fresh air. Keep warm. See doctor if difficulty breathing.

Concentrated HCl solution – corrosive.

Contact with skin and eyes. Vapour inhaled.

Eye: flood with tap water (10min). See doctor. Skin:drench with plenty water. Inhalation: seek fresh air. See doctor if difficulty breathing.

CaCl2 – irritant

Contact with skin and eyes.

Eye: flood eye with tap water (10min). See doctor if pain persists. Skin: rinse as necessary