Why use biological methods?
Why use biological methods?
An ore is a rock containing enough metal compound to make extraction worthwhile. A low-grade ore contains only a small percentage of the metal compound, so conventional mining and smelting may use a lot of energy to obtain very little metal.
Step-by-step lessons on Edexcel GCSE Chemistry 5.1.4 Biological methods of metal extraction. Each one builds up to exam-style questions. Nail the core quantitative topics — moles, balancing equations and calculations — early on, since they underpin higher-tier questions across every paper and topic.