Titration of potassium ferric oxalate trihydrate (K₃[Fe(C₂O₄)₃]*3H₂O)
The concentration of KMnO₄ is 0.020477 mol/L.
1st titration: the weight of ferric oxalate trihydrate sample is 0.104g
12.6ml titrant (KMnO₄ solution) used when reached the endpoint.
2nd titration: the weight of ferric oxalate trihydrate sample is 0.108g
13.2ml titrant (KMnO₄ solution) used when reached the endpoint.
3rd titration: the weight of ferric oxalate trihydrate sample is 0.101g
12.5ml titrant (KMnO₄ solution) used when reached the endpoint.
(The Moral mass of K₃[Fe(C₂O₄)₃]*3H₂O is 491.243 g/mol; the molar mass of (C₂O₄²⁻) =88.010 g/mol)
Calculate the number of moles oxalate present in each of the three samples using the titration data.