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[" 76."20mL" of a solution containing fe...

[" 76."20mL" of a solution containing ferrous sulphate and ferric "],[" sulphate acidified with "H_(2)SO_(4)" is reduced by netallic zinc.The "],[" solution required "27.4mL" of "0.1N" solution of "K_(2)Cr_(2)O_(7)" for "],[" oxidation.However before reduction with "zinc,20mL" of same "],[" solution required "17.96mL" of same "K_(2)Cr_(2)O_(7)." Calculate the "],[" mass of "FeSO_(4)" and "Fe_(2)(SO_(4))_(3)" per litre of the solution."]

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