Phytomining produces an ash and bioleaching produces a leachate solution. Why does neither method remove the need for further chemical processing?
Both methods produce copper that is too impure to be sold to industry
In both methods the copper is present as a compound and not as the metal
Both methods produce copper that is mixed with the iron used to displace it
In both methods the copper is dissolved and must first be crystallised out
40 exam-style questions on AQA GCSE Chemistry 10.1 Using the Earth's resources and obtaining potable water, covering 10.1.1 Using the Earth's resources and sustainable development, 10.1.2 Potable water, 10.1.3 Waste water treatment, and 10.1.4 Alternative methods of extracting metals. Each one has a worked solution and a mark scheme showing where the marks go.