1.

Amount of oxalic acid present in a solution can be determined by its titration with KMnO_(4) solution in the presence of H_(2)SO_(4) . The titration gives unsatisfactory results when carried out in the presence of HCl because HCl

Answer»

OXIDISES oxalic ACID to CARBON dioxide and water
gets oxidised by oxalic acid to chlorine
furnishes `H^(+)` ions in addition to those from oxalic acid.
reduces permanganate to `Mn^(2+)`

Solution :`KMnO_(4)` can oxidise HCl also into `Cl_(2)` itself gets REDUCED to `Mn^(2+)`.


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