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AQA · GCSE · Chemistry · Higher

Substance X in electrolysis

Q06.3 1 mark

Figure 10 shows the electrolysis cell used to extract aluminium from aluminium oxide.

Figure 10
Figure 10

Figure 10

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Figure 10

Name substance X shown in Figure 10.

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Marking points

  1. 1 Names substance X as cryolite.

Full-mark answer

Cryolite.

Why this answer loses marks

Aluminium oxide.

The figure already names aluminium oxide as one part of the mixture; substance X is the additive used with it in the molten electrolyte.

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