why did not we use HNO3 OR HCl instead of H2SO4 in KMnO4 vs oxalic acid titration?
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Side by side KMnO4 is oxidising oxalate ion to CO2. ... Acid is needed to provide the H+ (aq) ions, so that this particular reaction occurs. If HCl (aq) were used instead of sulfuric acid, the permanganate ions would oxidise the Cl- ions to form Cl2 (g) and so would not be available to react with the oxalic acid.
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