When KMnO_4 solution is added to hot oxalic a | vedclass

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(A) The reaction between $KMnO_4$ and oxalic acid $(H_2C_2O_4)$ in an acidic medium is given by: $2MnO_4^- + 5H_2C_2O_4 + 6H^+ \rightarrow 2Mn^{2+} +

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$Mn^{2+}$ acts as auto catalyst

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(A) The reaction between $KMnO_4$ and oxalic acid $(H_2C_2O_4)$ in an acidic medium is given by: $2MnO_4^- + 5H_2C_2O_4 + 6H^+ \rightarrow 2Mn^{2+} + 10CO_2 + 8H_2O$. In this reaction,$Mn^{2+}$ ions are produced as a product. These $Mn^{2+}$ ions act as an auto-catalyst,which increases the rate of the reaction significantly. Therefore,the reaction is slow at the beginning due to the absence of $Mn^{2+}$ ions,but it becomes instantaneous once sufficient $Mn^{2+}$ is formed.

When $KMnO_4$ solution is added to hot oxalic acid solution,the decolourisation is slow in the beginning but becomes instantaneous after some time. This is because

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