Chemistry · GCSE · Rates & Equilibrium

Equilibrium

EquilibriumFree1:03Heddy Score 3 of 7, below the standard

What you need to know

  • Dynamic equilibrium occurs when forward and reverse reactions proceed at equal rates in a closed system.
  • At equilibrium, concentrations stay constant even though reactions continue.

In this clip

Runs 1:03, from 2:22 to 3:25 of the full video.

Heddy Score3/7, Below the standard
See the seven stars
  • 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 · passed. 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.
★ passed · ☆ pending · ✕ failed
Our students

Not enough students yet

Our own students' answers. These are what move ★7 Proven.
On YouTube

1.07M views · 13.1K likes · TED-Ed 23M subscribers

As reported by YouTube on 2026-11-02. Not part of the Heddy Score.
How the Heddy Score works

Why we picked it

The dedicated equilibrium section helps distinguish an unchanged mixture from a stopped reaction.

TED-Ed on YouTubechecked 2026-10-18

Plays from youtube-nocookie.com. No YouTube cookies until you press play.