Chemistry · GCSE · Rates & Equilibrium
Factors that affect the rate of reaction
gcse-chem-5-6-1-2Free4:05Heddy Score 2 of 7, below the standardPlays from youtube-nocookie.com. No YouTube cookies until you press play.
What you need to know
- Increasing concentration makes collisions more frequent, so the rate rises.
- Rate can be followed by timing a cross disappearing as a cloudy precipitate forms.
- Rate can also be followed by measuring the volume of gas given off.
In this clip
0:27–4:32Factors that affect the rate of reactiongcse-chem-5-6-1-2Also coversMean rate of reactiongcse-chem-5-6-1-1aHeddy 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
GCSE required practical on rates of reaction, covering two methods of measuring rate.
Freesciencelessons on YouTubechecked 2026-10-16