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EEJ MAIN Chemistry QUESTION #7164
Question 1
In the redox titration of oxalate ions with permanganate in an acidic medium, how many electrons are involved in the production of a single molecule of $CO_{2}$?
  • $5$
  • $2$
  • $10$
  • $1$✔️
Correct Answer Explanation
The half-reaction for oxalate is: $C_{2}O_{4}^{2-} \rightarrow 2CO_{2} + 2e^{-}$. In this process, 2 electrons are released for every two molecules of $CO_{2}$ produced. Therefore, for one molecule of $CO_{2}$, the number of electrons involved is $2/2 = 1$.