Reversibility and dynamic equilibria

2 marks · Hard

Write a balanced symbol equation for the reversible thermal decomposition of ammonium chloride, including the correct symbol for a reversible reaction.

Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.

Show answer

Must show: ammonium chloride as solid, ammonia and hydrogen chloride as gases, reversible arrow (\rightleftharpoons)

Also accept: NH4Cl(s) ⇌ NH3(g) + HCl(g)

Common mistakes: using a single arrow; missing state symbols; incorrect balancing

Show mark scheme and worked solution

Marking points

B1 · 1 mark · Correct formulae for all reactants and products, with state symbols.

B2 · 1 mark · Correct reversible arrow (⇌) used in the equation.

Worked solution