Chemistry · GCSE · Particles & States of Matter
Chromatography and Rf values
gcse-chem-5-8-1-3Free4:40Heddy Score 2 of 7, below the standardPlays from youtube-nocookie.com. No YouTube cookies until you press play.
What you need to know
- Chromatography separates substances in a mixture.
- The paper is the stationary phase and the solvent is the mobile phase.
- Rf is the distance moved by the spot divided by the distance moved by the solvent.
In this clip
0:45–5:25Chromatography and Rf valuesgcse-chem-5-8-1-3Heddy ScoreSeven checks every clip must pass before students see it: trusted, on the map, accurate, focused, accessible, safe, and proven by students.2/7, Below the standard
- Trusted source · passed. The creator's own upload, live and playable here.
- On the map · not judged yet. A teacher watched it: it mainly teaches this map topic.
- Spec-true · not judged yet. Accurate, and right for the current UK specification.
- Focused · passed. One idea, short enough to watch in one go.
- Accessible · not judged yet. Good captions, clear sound and pictures.
- Safe for children · not judged yet. Right for 11 to 16 year olds, with no sales pitch.
- Proven · not judged yet. Earned from our students: they learn from it, find it helpful and watch it to the end.
Our students
How the Heddy Score worksNot enough students yet
Our own students' answers. These are what move ★7 Proven.Why we picked it
Clear short Cognito lesson on paper chromatography and Rf values for GCSE.
Cognito on YouTubechecked 2026-10-16