Calculate the percentage of copper in the coin

Posted on 2013-11-08 18:47:00 in Chemistry by CONSTANCE_555

A solution was prepared by dissolving 6.0g of a copper coin in HNO₃ and the solution was made to 1litre. 20ml of this solution was titrated with KI and the liberated Iodine was titrated against 0.05 N Na₂S₂O₃ which required 19.8ml for complete titration. Calculate the percentage of copper in the coin.

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