Amount of oxalic acid present in a solution can be determined by its titration with KMnO…
Chemistry · JEE Main · NTA Exams — Principles Related To Practical Chemistry
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:
- HCl gets oxidised by oxalic acid to chlorine
- furnished H+ ions in addition to those from oxalic acid
- reduces permanganate to Mn2+
- oxidise oxalic acid to carbon dioxide and water
Answer
(A) HCl gets oxidised by oxalic acid to chlorine
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