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Chemistry Question on Redox reactions

Equivalent weight of FeC2O4FeC_2O_4 in the change, FeC2O4−>Fe3++CO2 {FeC2O4 -> Fe^{3+} + CO2}

A

M/3

B

M/6

C

M/2

D

M/1

Answer

M/3

Explanation

Solution

Here both Fe and oxalate ion undergo a change in oxidation number as shown below : The overall reaction is a 3e−3e^- change and hence the equivalent weight of FeC2O4=mol. wt3=M3FeC_{2}O_{4} = \frac{mol. \,wt}{3} = \frac{M}{3}