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प्रश्न
Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with oxalic acid? Write the ionic equation for the reaction.
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उत्तर
Potassium permanganate can be made by the following methods:
In the laboratory, salts of the manganese (II) ion are oxidized by oxydisulfate to form permanganates.
\[\ce{MnO^-_4 + 8H+ + 5e- -> Mn^{2+} + 4H2O] \times 2}\]
\[\begin{array}{cc}
\ce{COO-}\phantom{.....................}\\
5| \ce{-> 10CO2 + 10e-}\\
\ce{COO-}\phantom{.....................}\\
\end{array}\]
______________________________________________________
\[\ce{2MnO^-_4 + 16H+ + 5C2O^{2-}_4 -> 2Mn^{2+} + 10CO2 + 8H2O}\]
संबंधित प्रश्न
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\[\ce{Cr2O^{2-}7 + 2OH^- ->}\]
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