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10.3 Using materials

10.3 Using materials

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Question 4

The purity of gold alloys is traditionally measured in carats, where:

  • Pure gold (100% gold by mass) is 24 carat.
  • 50% gold by mass is 12 carat.

An artisan manufacturer produces high-end luxury pen nibs, X and Y, which are made from an alloy of gold and silver only.

Table 1 shows information about these pen nibs.

Gold itemCaratMass of gold in gramsMass of silver in grams
Nib X?1014
Nib Y1815?

Complete Table 1 by finding the missing values represented by the question marks.

[5]
Markscheme

10.3 Using materials Questions

  1. GCSE
  2. /Chemistry
  3. /10.3 Using materials

18 exam-style questions on AQA GCSE Chemistry 10.3 Using materials, covering 10.3.1 Corrosion and its prevention, 10.3.2 Alloys as useful materials, and 10.3.3 Ceramics, polymers and composites. Each one has a worked solution and a mark scheme showing where the marks go.

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