Chemistry 9701 · AS & A Level · Nitrogen and sulfur

Nitrogen and sulfur — practice question

Ammonia is an important industrial chemical that is produced on a large scale through the Haber process.
(a(i))[2]

Give a balanced equation, including state symbols, for the reaction in the Haber process.

(a(ii))[2]

State three essential operating conditions used in the Haber process.

(a(iii))[1]

State one large-scale use of ammonia.

(b(i))[2]

Give the formulae of the two reactants heated together to make ammonia in the laboratory setup shown.

(b(ii))[2]

Construct a balanced equation for the reaction between the two reactants.

(b(iii))[5]

Several drying agents are known, including calcium oxide, concentrated sulfuric acid and phosphorus(V) oxide. Which one of these should be placed in the drying tower in this experiment? Explain your choice.

(c)[3]

Ammonia is a weak base that forms salts containing the ammonium ion. Using an equation and displayed formulae, describe how the ammonium ion forms and how it is structured.

(iii)[5]

Several drying agents are known, including calcium oxide, concentrated sulfuric acid and phosphorus(V) oxide. Which one of these should be placed in the drying tower in this experiment? Explain your choice.

Worked solution & mark scheme

This 22-mark question has a full step-by-step worked solution and mark scheme. One marking point: Balanced equation: $\mathrm{N_2(g)+3H_2(g)\rightarrow2NH_3(g)}$ with state symbols

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