Describe the process of obtaining copper from solutions of copper compounds using scrap iron.

Copper can be obtained from solutions of copper compounds by a displacement reaction. In this process, scrap iron is added to the copper solution, where it displaces copper ions from the solution, resulting in the formation of solid copper and iron ions in the solution.

A strong answer should directly address the approved learning objective to describe how copper can be obtained from solutions of copper compounds by displacement using scrap iron. (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.