When KMnO_4 solution is added to hot oxalic a | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(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+} +

Vedclass · Accepted Answer

$Mn^{2+}$ acts as autocatalyst

Vedclass · Answer

(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 autocatalyst,meaning they increase the rate of the reaction as their concentration increases. Initially,the concentration of $Mn^{2+}$ is very low,so the reaction is slow. As the reaction proceeds,more $Mn^{2+}$ is formed,which accelerates the reaction,making the decolourisation instantaneous.

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

Similar Questions

Identify the incorrect pair from the following:

Which of the following statements is wrong?

What is the role of a catalyst in a catalysed reaction?

Hydrogenation of vegetable oil in the presence of Raney Nickel is an example of what?

Which of the following is true about a catalyst?

Vedclass Test Series

Exam Paper Generator

Online Exam Module