The equivalent weight of MnSO4 is half its molecular weight when it is converted to

Equivalent  weight=molecular  weightvalency  factorIf valency factor is 2, then equivalent weight will be equal to half its molecular weight.In MnSO4, the oxidation state of Mn is +IIIn Mn2O3, the oxidation state of Mn is +IIIIn MnO2, the oxidation state of Mn is +IVIn MnO4−, the oxidation state of Mn is +VIIIn MnO42−, the oxidation state of Mn is +VIThus, when MnSO4 is converted into MnO2, then the valency factor is 2, and the equivalent weight of MnSO4 will be half of its molecular weight.