Chemistry·Scientific processes · NSSCO 1.5
Experimental skills, accuracy & purification
Narrated lesson · press play
A good chemist picks the right apparatus, works cleanly and knows how to purify a substance. Learn which apparatus measures time, temperature, mass and volume, how pure substances differ from mixtures, and the separation methods — filtration, crystallisation, distillation and chromatography.
What you'll learn in this lesson
By the end you should be able to (NSSCO Chemistry 1.5):
- Name apparatus for measuring time, temperature, mass and volume (including burette, pipette, measuring cylinder)
- Recognise that mixtures melt/boil over a range, and pure substances have sharp melting/boiling points
- Explain the importance of purity (e.g. foodstuffs and drugs)
- Describe purification by filtration, crystallisation, re-crystallisation, distillation and paper chromatography
- Interpret simple chromatograms including Rf values
Loading your lesson…
You're watching a free 3-minute preview — create a free account to keep going.
Quick revision
Revise this in 5 minutes
Miss Rachel and Mike talk through the whole topic — with the figure and working drawn live.