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6.1 Transition metals, alloys and corrosion

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Question 16
F

The purity of gold is measured in carats. Pure gold is 24 carat. 9-carat gold contains 9 parts by mass of gold in every 24 parts of the alloy, and 18-carat gold contains 18 parts in every 24. A jeweller has a 4.8 g ring made of 9-carat gold. She melts it with pure gold to make 18-carat gold. What mass of pure gold must she add?

[1]
A

1.8 g1.8\,\mathrm{g}1.8g

B

4.8 g4.8\,\mathrm{g}4.8g

C

7.2 g7.2\,\mathrm{g}7.2g

D

9.0 g9.0\,\mathrm{g}9.0g

Markscheme

6.1 Transition metals, alloys and corrosion Questions

  1. GCSE
  2. /Chemistry
  3. /6.1 Transition metals, alloys and corrosion

42 exam-style questions on Edexcel GCSE Chemistry 6.1 Transition metals, alloys and corrosion, covering 6.1.1 Properties of transition metals, 6.1.2 Corrosion and its prevention, and 6.1.3 Alloys and the uses of metals. Each one has a worked solution and a mark scheme showing where the marks go.

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