Chemistry

14. Simple redox titration

  • 00:57 Why is it important to not to use water from the tap?
  • 01:19 Why is it important to invert the flask a number of times? 
  • 01:25 Why do we measure manganate(VII) solutions from the TOP of the meniscus and not from the bottom? 
  • 01:30 Do you know where to look on the burette in order to find out how many significant figures should be recorded?

  • a digital balance (pref. 3-decimal place, but minimum 2-dp)

  • eye protection

  • 50.0 cm³ burette and funnel 

  • 25.0 cm³ volumetric pipette and filler

  • 250 cm³ conical flasks

  • 250 cm³  volumetric flask

  • pasteur pipette

Hazard Risk Control measure

Unknown iron salt 

Harmful
Contact with eye or skin
Inhaling dust 

Eye: Flood with water (10min)
See doctor.
Skin: Wash off with water
Seek fresh air. See doctor if breathing is difficult 

1.0mol dm-3 H2SO4 solution

Irritant
Contact with eye or skin
Inhaling dust 

Eye: flood with water (10min)

Skin: wash off with water.

Seek fresh air. See doctor if breathing is difficult

Standardised KMnO4 solution (~0.02mol dm-3)

Contact with skin

(stains skin)

Wash using soap