The same quantity of a reductant is oxidised separately by KMnO4 in strongly acidic, neutral and strongly alkaline (to MnO4^2-) media. The ratio of the moles of KMnO4 consumed (acidic : neutral : alkaline) is

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The same quantity of a reductant is oxidised separately by $KMnO X_{4}$ in strongly acidic, neutral and strongly alkaline (to $MnO X_{4} X^{2 -}$ ) media. The ratio of the moles of $KMnO X_{4}$ consumed (acidic : neutral : alkaline) is

n-factors are 5 (to

Mn X^{2 +}

), 3 (to

MnO X_{2}

) and 1 (to

MnO X_{4} X^{2 -}

). For a fixed number of equivalents the moles of KMnO4 are proportional to 1/n: 1/5 : 1/3 : 1/1 = 3 : 5 : 15.