Group 17 — Chemistry 9701 AS & A Level Question & Worked Solution

(a(i))

What observation will be made when concentrated sulfuric acid is carefully added to solid sodium chloride?

(a(ii))

Write the balanced equation for the reaction.

(a(iii))[3]

Both $\text{H}_2\text{SO}_4$ and $\text{HCl}$ are strong acids in solution. What does the term strong acid mean?

(b(i))

State one observation you would make when this reaction is carried out with solid sodium iodide.

(b(ii))[3]

Explain why hydrogen iodide is not formed as a product in this reaction.

(c(i))

Aqueous silver nitrate is added slowly to aqueous sodium chloride and the mixture is then shaken with excess aqueous ammonia. Describe what you would see at each stage of the process.

(c(ii))

Write balanced equations, including state symbols, for every reaction that occurs in this process.

(c(iii))[8]

The same procedure of adding aqueous silver nitrate and then excess aqueous ammonia is repeated using aqueous sodium iodide rather than aqueous sodium chloride. State two differences that would be seen with aqueous sodium iodide.

Group 17 — practice question

Worked solution & mark scheme