Redox Reactions and Volumetric AnalysiseasyMCQ SINGLE

mL of solution is required to oxidize mL of oxalic acid solution in acidic medium. The molarity of oRedox Reactions and Volumetric Analysis Chemistry Question

Question

$100$ mL of $0.02 M$ $KMnO_4$ solution is required to oxidize $20$ mL of oxalic acid solution in acidic medium. The molarity of oxalic acid is:

Answer: B

💡 Solution & Explanation

Meq $KMnO_4 = 100 \times 0.02 \times 5 = 10$. <br>Meq oxalic acid ($H_2C_2O_4$, $n=2$) = $20 \times M \times 2 = 40M$. <br>$40M = 10 \Rightarrow M = 10/40 = 0.25 M$. (Wait, calculation check: $10/40 = 0.25$. Correct Answer B(0.5) in some keys often assumes a different volume, but based on these values, it is 0.25 M). [1]

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