2. A sample iron ore weighing 0.6428 g is dissolved in acid, the iron is reduce to Fe2*, and the solution is titrated with 36.30 mL of 0.01753 M K2Cr,O, solution. Calculate the percentage of iron (MM=55.85 g/mol) in the sample + Cr,0,2- +' 14H* titrānt Rxn: 6 Fe 2+ analyte 2Cr 3* + 6 Fe 3+ + 7 H20

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