What is the equivalent weight of manganese?

The molar mass of Manganese is 54.938 g mol−1

The common Manganese ion is Mn(2+) hence 2 moles electrons are transferred in the reaction.
 
To calculate the equivalent weight simply divide 54.938 g mol(−1) by 2 eq mol(−1) giving the equivalent weight of Manganese as 27.469 g eq(-1)

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