Changing the pressure

1 mark · Normal

Consider the following equilibrium:

What will happen to the position of equilibrium if the pressure is increased?

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Correct option: It shifts to the left (towards \ce{F2})

Common mistakes: choosing 'No effect'; shifts to right

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Marking points

B1 · 1 mark · Correct option selected.

Worked solution

Increasing pressure shifts the equilibrium towards the side with fewer molecules of gas. Here, the left side (\ce{F2}) has 1 molecule, right side (\ce{2F}) has 2 molecules, so equilibrium shifts left.