Equilibrium

Reactions that go both ways

An interactive lesson with 7 steps, about 6 minutes: you predict, drag and solve, with instant feedback on every answer. It runs in your browser and needs JavaScript.

What you’ll learn

• Reversible reactions settle where forward and backward rates are equal.
• K = [products]/[reactants] = k_f/k_b at equilibrium.
• Le Chatelier: an equilibrium shifts to partly undo a disturbance.

Steps

1. Forwards and backwards
2. Never at rest
3. Three quarters B
4. An equilibrium constant
5. Disturbing the balance
6. Removing the product
7. Squeezing ammonia