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Extracting copper from leachate
Biological methods are used to extract metal compounds from metal ores.
One method of producing copper from low-grade copper ores is by using bacteria. The bacteria produce leachate solutions that contain copper compounds.
Give two methods that can be used to extract copper from these leachate solutions.
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Marking points
- 1 Gives displacement using scrap iron.
- 2 Gives electrolysis.
Full-mark answer
1. Displace the copper using scrap iron. 2. Use electrolysis.
Why this answer loses marks
Use electrolysis.
This gives only one method; the response needs another distinct recovery route as well.