Tag: redox and stoichiometry

For the redox reaction $MnO^- _4+C _2O^{3+} _4+H^+\rightarrow Mn^{2+}+CO _2+H _2O$. The correct whole number stoichiometric coefficients of $MnO^- _4, C _2O^{3+} _4$ and $H^+$ are respectively.

0.2 g of a sample of $
{\text{H}} _{\text{2}} {\text{O}} _{\text{2}}
$ required 10 mL of 1 N $
{\text{KMnO}} _{\text{4}}
$ in a titration in the presence of $
{\text{H}} _{\text{2}} {\text{SO}} _{\text{4}}
$. Purity of $
{\text{H}} _{\text{2}} {\text{O}} _{\text{2}}
$ is:

In alkaline medium, $ClO _2$ oxidizes $H _2O _2$ to $O _2$ and is itself reduced to ${ClO} _2^{\displaystyle-}$. Number of moles of $H _2O _2$ oxidized by 1 mole of $ClO _2$ is :

Give the products available on the cathode and the anode respectively during the electrolysis of an aqueous solution of $MgSO _4$ between inert electrodes.

For the reaction of $MnO _2\,+\,C _2O _{4}^{2-}\,+\,H^+\,\rightarrow\,Mn^{2+}\,+\,CO _2\,+\,H _2O$ the correct whole number stoichiometric coefficients of $MnO _4$ , $C _2$$O _4$ and $H^+$ are respectively :