Nitrogen and sulfur — Chemistry 9701 AS & A Level Question & Worked Solution

(a(i))

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

(a(ii))

State three key operating conditions used in the Haber process.

(a(iii))[5]

State one large-scale use of ammonia.

(b(i))

Ammonia can be prepared in a school or college laboratory using the apparatus shown. The reaction is a displacement of ammonia from one of its compounds. State the formulae of the two reactants that are heated together to produce ammonia.

(b(ii))

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

(b(iii))[5]

The drying tower could contain calcium oxide, concentrated sulfuric acid or phosphorus(V) oxide. Which of these should be used in this experiment? Explain your choice.

(c)[3]

Ammonia is a weak base and forms salts containing the ammonium ion. Describe, with the help of an equation, how the ammonium ion forms and what its structure is. You should use displayed formulae in your answer.

Nitrogen and sulfur — practice question

Worked solution & mark scheme