Chemistry - volumetic analysis

Q1) i. To make up 25 mL of 0.008M KMnO4, how many grams of pure KMnO4 are required?

ii. Calculate how many mL of 0.40 M FeSO4 this sample of solution requires for complete reaction in acidified solution.

Q2) Titraion of 25mL of acidified ron(ll) sulfate solution with potassium permanganate solution of concentration(0.0500 mol/L) gives an average titre value of 24mL. Calculate the concentration of the ferrous sulfate solution.

Q3)
A) Given that H2C2O4 --> CO2, balance the half-equation for this reaction.

B) Hence write a balanced chemical equation for its reaction with permangante ions.

C) Calculate the concentration of permanganate ions. ( use mole ratio obtained in B)
The volume of oxalic acid in each titration is 20mL. The average titre value is 20.4mL. (oxalic acid H2C2O4, 0.0956mol/L)


Thanks a LOT!