4. Calculate the volume of 0.1 mol/l potassium iodate solution consumed in the quantitative determination of ascorbic acid by the iodatometric method, if the exact mass of the substance is 0.5302. Ascorbic acid in the preparation must be at least 99.0%. The molar mass of ascorbic acid is 176.13. Give equations for chemical reactions. Write the equations of chemical reactions, indicate the equivalence factor, molar mass of the equivalent, titer.

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