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  4. Which acts as auto catalyst during titration of KMnO4 and oxalic acid in presence H2SO4 ?

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Q. Which acts as auto catalyst during titration of $ KMn{{O}_{4}} $ and oxalic acid in presence $ {{H}_{2}}S{{O}_{4}} $ ?

BHUBHU 2006

Solution:

$ MnS{{O}_{4}} $ acts as auto catalyst during the titration of $ KMn{{O}_{4}} $ and oxalic acid in presence of $ {{H}_{2}}S{{O}_{4}}.Mn{{O}_{4}} $ is formed during the reaction.
$ 5{{H}_{2}}{{C}_{2}}{{O}_{4}}+2KMn{{O}_{4}}+3{{H}_{2}}S{{O}_{4}}\xrightarrow{{}}2MnS{{O}_{4}} $ $ +{{K}_{2}}S{{O}_{4}}+10C{{O}_{2}}+8{{H}_{2}}O $