If `M` is the molecular weight of `KMnO_(4)`, its equivalent weight will be when it is converted into `K_(2)MnO_(4)`

Explanation

The change involved is `MnO_(4)^(-) + e^(-) rarr MnO_(4)^(2-)`
i.e. it involves only one electron
Eq. wt. = MoLwt./number of `e^(-)` involved = M/1 = M [Molwt. = M]