GCSE Chemistry Specification

Edexcel 1CH0

Section 4: (b) Reversible reactions and equilibria

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#4.13

Recall that chemical reactions are reversible, the use of the symbol ⇌ in equations and that the direction of some reversible reactions can be altered by changing the reaction conditions

#4.14

Explain what is meant by dynamic equilibrium

#4.15

Describe the formation of ammonia as a reversible reaction between nitrogen (extracted from the air) and hydrogen (obtained from natural gas) and that it can reach a dynamic equilibrium

#4.16

Recall the conditions for the Haber process as:

a) temperature 450°C
b) pressure 200 atmospheres
c) iron catalyst

#4.17

Predict how the position of a dynamic equilibrium is affected by changes in:

a) temperature
b) pressure
c) concentration