1. Topic
Dynamic equilibria
Level
GCSE and A Level
Outcomes
Use a model to describe and explain what happens to
(i) the rate of the forward and reverse reactions
(ii) the concentration of reactants and products
at dynamic equilibrium.
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2. Time = 0.00
Alfie
Otis
Reactants = 10
Products = 0

3. Time = 1.00
Alfie
Otis
Reactants = 9
Products = 1

4. Time = 2.00
Alfie
Otis
Reactants = 9
Products = 1

5. Time = 3.00
Alfie
Otis
Reactants = 9
Products = 1

6. Time = 4.00
Alfie
Otis
Reactants = 9
Products = 1

7. Time = 5.00
Alfie
Otis
Reactants = 8
Products = 2

8. Time = 6.00
Alfie
Otis
Reactants = 8
Products = 2

9. Time = 7.00
Alfie
Otis
Reactants = 8
Products = 2

10. Time = 8.00
Alfie
Otis
Reactants = 7
Products = 3

11. Time = 9.00
Alfie
Otis
Reactants = 7
Products = 3

12. Time = 10.00
Alfie
Otis
Reactants = 7
Products = 3

13. Time = 11.00
Alfie
Otis
Reactants = 7
Products = 3

14. Time = 12.00
Alfie
Otis
Reactants = 7
Products = 3

15. Time = 13.00
Alfie
Otis
Reactants = 7
Products = 3

16. Time = 14.00
Alfie
Otis
Reactants = 7
Products = 3

17. Time = 15.00
Alfie
Otis
Reactants = 7
Products = 3

18. Time = 16.00
Alfie
Otis
Reactants = 7
Products = 3

19. Time = 17.00
Alfie
Otis
Reactants = 7
Products = 3

20. Time = 18.00
Alfie
Otis
Reactants = 7
Products = 3

21. Time = 19.00
Alfie
Otis
Reactants = 7
Products = 3

22. Time = 20.00
Alfie
Otis
Reactants = 7
Products = 3

23. Time = 21.00
Alfie
Otis
Reactants = 7
Products = 3

24. Alfie and Otis were having a snowball fight
Alfie and Otis were having a snowball fight. Here are the number of snow balls on each side of the wall. Why did the results not change after 7s?
Time (s)
Alfie
Otis 10 1 9 5 8 2 7 3 12
This model represents what happens in a chemical reaction at dynamic equilibrium. Can you use this model to describe and explain what happens to:
The rate of the forward and reverse reactions
The concentration of the reactants and products