Question detail
Explain why electrolysis is used to extract copper from low-grade ores.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Using the Earth's resources and obtaining potable water
Question
Explain why electrolysis is used to extract copper from low-grade ores.
Answer
Electrolysis is used for extracting copper from low-grade ores because traditional methods may not be efficient due to the lower concentration of copper. Electrolysis allows for the extraction of copper from solutions, making it feasible to obtain copper even from ores with lower metal content.
Explanation
A strong answer should directly address the approved learning objective to describe how copper can be obtained from solutions of copper compounds by electrolysis. (HT only). This question belongs to Alternative methods of extracting metals within Using the Earth's resources and obtaining potable water, so the response should use that exact curriculum context rather than a generic statement. The answer is correct when it names the key idea, explains the link to HT only, and keeps the wording specific to AQA GCSE revision.
Common mistake
Confusing Electrolysis with Other Methods
Students often confuse electrolysis with other methods of copper extraction, such as displacement or reduction with carbon.
To fix this, students should focus on the specific process of electrolysis, understanding that it involves using an electric current to separate copper ions from a solution.
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