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WBJEE 2014 Chemistry Solved Paper

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Question : 59

Total: 60

The formal potential of Fe3+ / Fe2+ in a sulphuric acid and phosphoric acid mixture (E°=+0.61V) is much lower than thestandard potential (E°=+0.77V). This is due to

formation of the species [FeHPO4]+
lowering of potential upon complexation
formation of the species [FeSO4]+
high acidity of the medium

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