The effect of concentration

1 mark · Easy

The equilibrium below is reached in a closed vessel:

State what happens to the position of equilibrium if some HI(g) is removed.

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The equilibrium shifts to the right (towards more HI formed).

Also accept: Shifts to the right; Moves right; Equilibrium shifts to the products

Common mistakes: Shifts to the left

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Marking points

A1 · 1 mark · States equilibrium shifts right/towards HI formation.

Worked solution

Removing HI(g) means the system reacts more H2 and I2 to produce more HI, so equilibrium shifts right.