(a) 50 mL of 0.2 N KMnO_(4) is required for complete oxidation of 0.45 g of anhydrous oxalic acid. Calculate the normality of oxalic acid solution. (b) In the titration of Fe^(2+) ions with KMnO_(4) in acid medium, why is dilute H_(2)SO_(4) used and not dilute HCl ?

(a) 50 mL of 0.2 N KMnO_(4) is required for complete oxidation of 0.45

1.	(a) 50 mL of 0.2 N KMnO_(4) is required for complete oxidation of 0.45 g of anhydrous oxalic acid. Calculate the normality of oxalic acid solution. (b) In the titration of Fe^(2+) ions with KMnO_(4) in acid medium, why is dilute H_(2)SO_(4) used and not dilute HCl ?
Answer» SOLUTION :The reaction INVOLVED in the titration is : `10FeSO_(4)+2KMnO_(4)+3H_(2)SO_(4) to 5Fe_(2)(SO_(4))_(3)+K_(2)SO_(4)+2MnSO_(4)+3H_(2)O` If HCL is taken in place of `H_(2)SO_(4)`, then HCl will be oxidised to `Cl_(2)`