Topic
Dynamic equilibria
Outcomes
1.
Level
GCSE and A Level
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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Time = 0.00
Otis
Alfie
Reactants = 10
Products = 0
Time = 1.00
Otis
Alfie
Reactants = 9
Products = 1
Time = 2.00
Otis
Alfie
Reactants = 9
Products = 1
Time = 3.00
Otis
Alfie
Reactants = 9
Products = 1
Time = 4.00
Otis
Alfie
Reactants = 9
Products = 1
Time = 5.00
Otis
Alfie
Reactants = 8
Products = 2
Time = 6.00
Otis
Alfie
Reactants = 8
Products = 2
Time = 7.00
Otis
Alfie
Reactants = 8
Products = 2
Time = 8.00
Otis
Alfie
Reactants = 7
Products = 3
Time = 9.00
Otis
Alfie
Reactants = 7
Products = 3
Time = 10.00
Otis
Alfie
Reactants = 7
Products = 3
Time = 11.00
Otis
Alfie
Reactants = 7
Products = 3
Time = 12.00
Otis
Alfie
Reactants = 7
Products = 3
Time = 13.00
Otis
Alfie
Reactants = 7
Products = 3
Time = 14.00
Otis
Alfie
Reactants = 7
Products = 3
Time = 15.00
Otis
Alfie
Reactants = 7
Products = 3
Time = 16.00
Otis
Alfie
Reactants = 7
Products = 3
Time = 17.00
Otis
Alfie
Reactants = 7
Products = 3
Time = 18.00
Otis
Alfie
Reactants = 7
Products = 3
Time = 19.00
Otis
Alfie
Reactants = 7
Products = 3
Time = 20.00
Otis
Alfie
Reactants = 7
Products = 3
Time = 21.00
Otis
Alfie
Reactants = 7
Products = 3
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
0
10
0
1
9
1
5
8
2
7
7
3
8
7
3
10
7
3
12
7
3
This model represents what
happens in a chemical
reaction at dynamic
equilibrium. Can you use this
model to describe and explain
what happens to:
(i) The rate of the forward
and reverse reactions
(ii) The concentration of the
reactants and products