(a) defi ne oxidation and reduction (redox) in terms of oxygen/hydrogen gain/loss
(b) defi ne redox in terms of electron transfer
(c) identify redox reactions in terms of oxygen/hydrogen, and/or electron, gain/loss
(d) describe the use of aqueous potassium iodide in testing for oxidising agents and acidifi ed potassium
manganate(VII) in testing for reducing agents from the resulting colour changes
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