Note AcademyNote Academy
Start

Chemistry · Oct / Nov 2016 · Paper 22 · Question B9

5070

As printed in the paper

The question as text

B9 Both copper and magnesium are metals.

Read automatically from the paper; the printed page above is exact.

Show the answer and mark scheme

  • B9(a)[1]

    magnesium loses (outer shell) electrons more easily than copper/copper cannot give (outer shell) electrons to hydrogen ions but magnesium can ORA (1)

    1

  • B9(b)[1]

    the more zinc the greater the strength/the more copper, the lower the strength (1)

    1

  • B9(c)[3]

    layers (of atoms/ions) in copper can slide (when a force is applied) (1)

    atoms/ions of zinc are different size to those of copper/atoms of zinc disrupt the copper lattice (1)

    layers (of atoms/ions) in alloy cannot slide (as easily) (1)

    3

  • B9(d)[3]

    two rods dipping into a liquid and joined to a power supply (1)

    electrolyte labelled as ‘aqueous copper ions’/named solution of soluble copper salt e.g. aqueous copper sulfate/solution of copper sulfate (1)

    copper anode/positive electrode AND steel cathode/ negative electrode (1)

    3

  • B9(e)[2]

    Cu2O (2)

    If two marks not scored, mol Cu = 9.86 64 AND mol O = 1.23 16 scores 1 mark 2 Total: 10

Practise this paper →

Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.