Oxidation & reduction questions (3)

1.The following procedure was used to determined the percentage of copper in a coin.Step 1. A coin with a mass of 3.03 g was completely dissolved in excess concentrated nitric acid, HNO3(aq). After the excess nitric acid had been neutralised and the oxides of nitrogen removed all the solution of copper(II) nitrate obtained was transferred into a volumetric flask and the total volume made up to 100 cm3 with distilled...

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