How would you calculate the equivalent mass of anhydrous oxalic acid and hydrated oxalic acid.

Explanation

In acid medium,

16 g of oxygen is used for oxidation of 90 g of oxalic acid.
`:.` 8 g of oxygen will oxidize = `90/16 xx 8 = 45 g eq^(-1)`
Equivalent mass of Anhydrous oxalic acid = 45 g `eq^(-1)`
Equivalent mass of `underset(COOH)(COOH)xx2H_(2)O = ("Molar mass")/("Basicity")`
= `126/2`
= 63 g `eq^(-1)`