In presence of fluoride ion Mn^(2+) can be titrated with MnO_(4)^(-) both reactants being converted to a complex of Mn(II) in presence of F^(-) ions. A 0.545 g of sample containing Mn_(3)O_(4) was dissolved and all manganese was converted to Mn^(2+). The titration in presence of fluoride ion consumed 31.1 mL of KMnO_(4) that was 0.117 N against oxalate. (a) Write balanced chemical equation of titration was assuming that the complex is MnF_(4)^(-). (b) What was the % of Mn_(3)O_(4) in sample?

In presence of fluoride ion Mn^(2+) can be titrated with MnO_(4)^(-) b

1.	In presence of fluoride ion Mn^(2+) can be titrated with MnO_(4)^(-) both reactants being converted to a complex of Mn(II) in presence of F^(-) ions. A 0.545 g of sample containing Mn_(3)O_(4) was dissolved and all manganese was converted to Mn^(2+). The titration in presence of fluoride ion consumed 31.1 mL of KMnO_(4) that was 0.117 N against oxalate. (a) Write balanced chemical equation of titration was assuming that the complex is MnF_(4)^(-). (b) What was the % of Mn_(3)O_(4) in sample?
Answer» ANSWER :(B) `40.734%`