a sample of 1 gram of Fe2O3 of 80% purity is dissolved in moderately concentrated HCl solution which is reduced by Zinc dust The resulting solution required 16.7 mL of 0.1 M solution of the oxidant. Calculate the number of electrons taken up by the oxidant

The reduction reaction isFe2O3 + 3Zn Con HCl 2 Fe + 3ZnOFe oxidation state in the LHS isFe2O32x + 3 (-2) = 02x = +6x = + 3 oxidation state of Fe in the right side isFe = 0Thus the change in electron is 3 for one iron atomAs there are 2 iron atom the oxidatnt takes 6 electrons. 

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