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6.1 Improving processes and products

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Question 19
F

Pure gold is 24-carat gold. 9-carat gold contains 9 parts of gold by mass in every 24 parts. The rest is other metals.

A jeweller has 6.0 g of pure gold. The jeweller uses all of it to make 9-carat gold.

What mass of other metals must be added?

[1]
A

2.25 g

B

3.75 g

C

10.0 g

D

16.0 g

Markscheme

6.1 Improving processes and products Questions

  1. GCSE
  2. /Chemistry
  3. /6.1 Improving processes and products

61 exam-style questions on OCR GCSE Chemistry 6.1 Improving processes and products, covering 6.1.1 Extracting metals industrially and by electrolysis, 6.1.2 Life cycle assessment and recycling, 6.1.3 Biological methods of metal extraction, 6.1.4 The Haber process and the production of fertilisers, 6.1.5 Alloys and their uses, 6.1.6 Corrosion and its prevention, 6.1.7 Comparing and selecting materials, and 6.1.8 Industrial conditions, rate and position of equilibrium. Each one has a worked solution and a mark scheme showing where the marks go.

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