Question

Answer the following
1. What can be inference from Daniel cell as for me it is similar to a simple electrolysis , I mean to say what idea we got from it
2. The equivalent weight of MnSO_​​​4 is half its molecular weight when converted to MnSO_​​​4 ---> MnO_{​​​​2} + 2e , explain.
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Answer 1

1) The cell converts the chemical energy liberated during the redox reaction in to the electrical energy.

2) we know that net oxidation state of Mn in MnSo₄ is Mn+(SO₄)=0
so,Mn+(-2)=0 (net charge of SO₄=-2)
Mn=2
now net charge of Mn in MnO₂=
Mn+(-2)2 (net charge on O=-2
Mn=4
MnSO₄-----MnO₂
equivalent weight =molecular weight (let M)/change in the oxidation state
equivalent weight=M/(4-2)
=M/2
Thus equivalent weight of MnSO₄ is half the molecular weight when it is converted to MnO₂