Reversible reactions - Eduqas

1

What does the symbol ⇌ mean in a chemical equation?

2

Which of these is a feature of an equilibrium reaction?

3

What happens to the position of equilibrium for the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g) when pressure is increased?

4

Why does the position of equilibrium for the reaction H2(g) + Cl2(g) ⇌ 2HCl(g) not change when pressure is increased?

5

How can the position of equilibrium for the reaction Fe3+(aq) + SCN-(aq) ⇌ FeSCN2+(aq) be moved to the left?

6

The production of ammonia, shown by the equation N2(g) + 3H2(g) ⇌ 2NH3(g), is exothermic. What effect does increasing temperature have on the position of equilibrium?

7

The position of equilibrium for a reaction does not change when the temperature is increased. Which of these statements about the reaction is true?

8

Why is it important to be able to change the position of an equilibrium reaction?

9

The production of ammonia, shown by the equation N2(g) + 3H2(g) ⇌ 2NH3(g), is exothermic. Which reaction conditions would result in the largest yield?

10

Sulfur trioxide is used to manufacture sulfuric acid. Sulfur trioxide is produced through the exothermic reaction, 2SO2(g) + O2(g) ⇌ 2SO3(g). Why is a high temperature of 450°C used to make sulfur trioxide industrially?