Correct: Losing electrons is oxidation, Gaining electrons is reduction, Increasing oxidation number = oxidation, Decreasing oxidation number = reduction, Oxidation number of elements = 0, Oxidation number of monoatomic ions is charge on the ion, Hydrogen in compounds has an oxidation number of +1, Oxygen in compounds has an oxidation number of -2, In polyatomic ions the oxidation numbers add up to equal the charge on the ion, To balance O in equations add water, To balance H in equations add H+, To balance charge add electrons to the most positive side, Orange dichromate is reduced to green Chromium (III) ion, Purple permanganate is reduced to colourless manganese (II) ion, Silver grey Magnesium is oxidised to colourless magnesium (II) ion, colourless chloride ions are oxidised to pale green chlorine gas, Incorrect: Losing electrons is reduction, Gaining electrons is oxidation, Increasing oxidation number = reduction, decreasing oxidation number = oxidation, Oxidation number of elements = -2, Oxidation of monoatomic ions is -1, Hydrogen in compounds has an oxidation number of -1, Oxygen in compounds has an oxidation number of +2, In polyatomic ions the oxidation numbers add up to 0, To balance O in equations add oxygen gas, To balance H in equations add water, To balance charge add electrons to the most negative side,
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L2 Redox
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