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Summary Grade 12 Chemistry - Chemical Equilibrium

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All aspects regarding Chemical Equilibrium in Grade 12 IEB syllabus Aspects covered are as follows: - Cover page - basic explanation - Dynamic Chemical Equilibrium - RICQE Tables - Le Chateliers Principle -Colour Changes and the common ion effect - Equilibrium Graphs - Rate vs concentratio...

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Document information

  • April 10, 2022
  • June 17, 2022
  • 8
  • 2021/2022
  • Summary

Subjects

  • chemistry
  • grade 12
  • matric
  • chemical equilibrium
  • equilibrium

Written for

  • Unknown
  • Physical Sciences
  • 200
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By: emmakalis • 3 months ago

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Content preview

Chemical
Equilibrium

, Chemical Equilibrium
An open system Reversible
It is one in which both energy and matter can be exchanged
Reaction
A reversible reaction is
between the system and its surroundings.
one in which products
can be converted back
A closed system into products
(happens in a closed
It is one in which mass is conserved inside the system but system)
energy can enter or leave the system freely.


DYNAMIC CHEMICAL EQUILIBRIUM
Explanation: It is when you have a reversible reaction in which the forward reaction and the reverse
reaction are taking place at the same rate and the concentrations of reactions and products are constant,
Factors that can change the equilibrium position: - Temperature
- Pressure (volume)
- Concentration
Concentration vs Time Graph Rate vs Time Graph




On the y-axis = quantity In the beginning the rate of reaction = high
(concentration/mass/volume/mol) Slows down as reactants are used up
The x-axis = time Top line = Forward reaction
Therefore graph shows how amount of reactants and Lower Line = Reverse reaction
products change over time @ T1 = chemical equilibrium - lines MUST meet
When the line straightens out = equilibrium is
reached
When the graph flattens out it means 3 things:
NOTE:
1. The quantity of both reactants and products Dynamic Chemical
for the forward and reverse reaction remains Equilibrium can ONLY
constant be reached in a closed
2. the rate of the forward reaction = rate of the system
reverse reaction
3. You have reached dynamic equilibrium

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