Organic Chemistry – Some Basic Principles And Techniques

  • Question
    CBSEENCH11008137

    Amount of oxalic acid present in a solution can be determined by its titration with KMnO4 solution in the presence of H2SO4. The titration gives unsatisfactory result when carried out in the presence of HCl, because HCl

    • gets oxidised by oxalic acid to chlorine

    • furnishes H+ions in addition to those from oxalic acid

    • reduces permanganate to Mn2+

    • oxidises oxalic acid to carbon dioxide and water 

    Solution

    C.

    reduces permanganate to Mn2+

    HCl being stronger reducing agent reduces MnO4 to Mn2+ and result of the titration becomes unsatisfactory.

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