Equilibria - OCR Gateway

1

Which is the correct symbol to show a reversible reaction?

2

What happens to the concentrations of reacting substances at equilibrium?

3

Ammonium chloride decomposes reversibly to form ammonia and hydrogen chloride when heated. What is the backward reaction for this process?

4

Which of these reactions is most likely to be reversible?

5

What happens to the forward and backward reactions at equilibrium?

6

Which statement about a dynamic equilibrium is correct?

7

When heated, blue hydrated copper sulfate forms white anhydrous copper sulfate and water. What happens if water is added to anhydrous copper sulfate?

8

The thermal decomposition of calcium carbonate is reversible: CaCO3 ⇌ CaO + CO2. The forward reaction is endothermic. What happens to the position of equilibrium when the reaction mixture is heated?

9

The thermal decomposition of calcium carbonate is reversible: CaCO3(s) ⇌ CaO(s) + CO2(g). What happens to the position of equilibrium when the pressure is increased? - Higher

10

Hydrogen can be made by reacting carbon with steam: C(s) + H2O(g) ⇌ H2(g) + CO(g). How can the equilibrium concentration of hydrogen be increased? - Higher