1. 1
   A student reacts copper(II) oxide with dilute hydrochloric acid to produce a blue salt solution.

   (a)

   Based on the acid used, what type of salt is formed?

   [1 mark]

   • AA sulfate
   • BA nitrate
   • CA chloride
   • DA carbonate

   (b)

   What is the correct name of the salt produced in this reaction?

   [1 mark]

   • ACopper(II) chloride
   • BCopper(II) sulfate
   • CCopper(II) nitrate
   • DCopper(II) carbonate

   (c)

   State the general rule linking the acid used to the type of salt produced, and use it to name the salt that would form if copper(II) oxide were instead reacted with dilute sulfuric acid.

   [2 marks]

   Total for question 1: 4 marks

2. 2
   A fertiliser manufacturer reacts ammonia solution with dilute nitric acid to produce a fertiliser salt rich in nitrogen.

   (a)

   What is the name of the salt produced?

   [1 mark]

   • AAmmonium chloride
   • BAmmonium nitrate
   • CAmmonium sulfate
   • DAmmonium carbonate

   (b)

   The manufacturer also produces a second fertiliser by reacting ammonia solution with dilute sulfuric acid instead. What is the name of this second salt?

   [1 mark]

   • AAmmonium nitrate
   • BAmmonium chloride
   • CAmmonium carbonate
   • DAmmonium sulfate

   (c)

   Explain why both ammonium nitrate and ammonium sulfate are classed as ammonium salts, even though they are produced using different acids.

   [2 marks]

   Total for question 2: 4 marks

3. 3
   A chemistry technician is preparing a set of reference salt samples for a school laboratory, and needs to react zinc oxide separately with three different dilute acids: hydrochloric acid, nitric acid, and sulfuric acid.

   (a)

   Name the three salts that would be produced, and explain the general naming pattern being used.

   [3 marks]

   (b)

   A new laboratory assistant mislabels one of the three zinc salt samples, writing "zinc chloride" on the bottle that was actually made using sulfuric acid. Explain the specific error that has been made, and describe two ways the technician could check which acid was actually used to correct the label.

   [4 marks]

   Total for question 3: 7 marks

4. 4
   A pharmaceutical supplier manufactures a range of metal salts for use in different products, reacting various metal oxides, hydroxides and carbonates with hydrochloric acid, nitric acid or sulfuric acid depending on the required product. A new employee is confused about how the final salt names are determined and asks for a clear explanation.

   (a)

   Describe, in detail, the complete naming system used for these salts, using several worked examples to illustrate the pattern, including for a carbonate reactant.

   [6 marks]

   (b)

   The new employee then asks: "If sodium carbonate reacts with hydrochloric acid, does the product get called sodium carbonate chloride, since both a carbonate and an acid are involved?" Evaluate this proposed name, explain what is actually incorrect about the reasoning behind it, and clearly state and justify the correct name of the product.

   [6 marks]

   Total for question 4: 12 marks

End of questions