4.6.1.1 · Measuring Rate
How do you calculate the mean rate of a reaction?
Show the answerHide the answer
Mean rate = quantity of reactant used ÷ time taken, or quantity of product formed ÷ time taken.
AQA GCSE Chemistry · Topic 6
Rates & Equilibrium flashcards
36 cards on Rates & Equilibrium, every one written against a numbered point in section 4.6 of the AQA Chemistry spec. Here’s what the topic covers, and 4 cards to try.
- 36Flashcards
- 6Sub-topics
- 9Higher only
Try 4 cards from Rates & Equilibrium.
Answer each one in your head, then check. In the app, how well you knew it decides when you see it again.
4.6.1.2–4.6.1.3 · Factors Affecting Rate
Name five factors that affect the rate of a chemical reaction.
Show the answerHide the answer
- Concentration of reactants in solution
- Pressure of reacting gases
- Surface area of solid reactants
- Temperature
- Presence of a catalyst
4.6.1.4 · Catalysts
What is a catalyst?
Show the answerHide the answer
A substance that changes (increases) the rate of a reaction but is not used up. Different reactions need different catalysts.
4.6.2.1–4.6.2.3 · Reversible Reactions
What is a reversible reaction?
Show the answerHide the answer
A reaction where the products can react to re-form the original reactants. Shown with the ⇌ symbol: A + B ⇌ C + D.
- +32more Rates & Equilibrium cards in the app, shown to you just before you’d forget them.Join the waitlist →
What’s in Rates & Equilibrium?
Every part of section 4.6 of the AQA spec, and how many cards cover it. Higher-only cards are hidden for Foundation students.
- 4.6.1.1Measuring Rate6 cards
- 4.6.1.2–4.6.1.3Factors Affecting Rate7 cards
- 4.6.1.2 RP5Required Practical: Rates4 cards
- 4.6.1.4Catalysts5 cards
- 4.6.2.1–4.6.2.3Reversible Reactions6 cards
- 4.6.2.4–4.6.2.7Changing Equilibrium8 cards
Required practicals in this topic.
The method, the variables and a worked example for each.
Launching November 2026
The other 32 cards are in the app.
revolve. shows you each Rates & Equilibrium card just before you’d forget it, so ten minutes a day is enough. It opens to students soon: join the waitlist and we’ll email you once, when it does.