3.2 g of pyrolusite (MnO2) was treated with 50 mL of 0.5 M oxalic acid and some sulphuric acid. The oxalic acid left undecomposed was raised to 250 mL in a flask. 25 mL of this solution when treated with 0.02 M KMnO4 required 32 mL of the solution. Find the percentage of MnO2 in the sample. Given: Atomic mass of Mn is 55 g mol−1

3.2 g of pyrolusite (MnO2) was treated with 50 mL of 0.5 M oxalic acid

1.	3.2 g of pyrolusite (MnO2) was treated with 50 mL of 0.5 M oxalic acid and some sulphuric acid. The oxalic acid left undecomposed was raised to 250 mL in a flask. 25 mL of this solution when treated with 0.02 M KMnO4 required 32 mL of the solution. Find the percentage of MnO2 in the sample. Given: Atomic mass of Mn is 55 g mol−1
Answer» $3.2 g$ of pyrolusite $(M n O_{2})$ was treated with $50 m L$ of $0.5 M$ oxalic acid and some sulphuric acid. The oxalic acid left undecomposed was raised to $250 m L$ in a flask. $25 m L$ of this solution when treated with $0.02 M K M n O_{4}$ required $32 m L$ of the solution. Find the percentage of $M n O_{2}$ in the sample. Given: Atomic mass of $M n$ is $55 g m o l^{- 1}$