3.92 g of a sample of Mohr's salt (ferrous ammonium sulphate, Mol. wt.-392) reacts completely with 50 ml of `N/10 KMnO_4` solution in an acidic medium. The percentage purity of the sample is

30 mL 0.05 M KMnO_(4) is required for complete oxidation of 0.5 g oxalate in acidic medium .Calculate the percent amount of oxalate in that salt sample

0.70g mixture of (NH_(4))_(2)SO_(4) was boiled with 100 ml of 0.2 N NaOH solution will all the NH_(3)(g) evolved and get dissolved to 250 mL and 10 mL of this solution was neutralised by using 10 mL of a 0.1 N H_(2)SO_(4) . The percentage purity of the (NH_(4))SO_(4) was boiled with 100 ml of 0.2 N NaOH solution till all the NH_(3)(g) evolved and get dissolved to 250 mL and 10 mL of this solution was neutralised by using 10 mL of a 0.1 N H_(2)SO_(4) solution. the percentage purity of the (NH_(4))_(2)SO_(4) sample is-

0.19 g of a improve H_(2)O_(2) sample is dissolve din a 20 mL solution. 0.316g of the solution reacts completely with KMnO_(4) in presence of H_(2)SO_(4) . Find the purity of H_(2)O_(2) sample.

0.804 g sample of iron was dissolved in acid , Iron was reduced to +2 state and it required 47.2 mL of 0.112 N KMnO_4 solution for titration. Calculate the percentage of iron and Fe_3O_4 in the ore.

10 ml of NaHC_2O_4 solution is neutralized by 10 ml of 0.1 M NaOH solution. 10 ml of same NaHC_2O_4 solution is oxidised by 10 ml of KMnO_4 solution in acidic medium. Calculate the molarity of KMnO_4 solution.

Give an example of a disproporrtionation reaction ? Calculate the volume of 0.2225(M) KMnO_(4) solution that can completely react with 45mL. Of a 0.125(M) FeSO_(4) solution in an acid meduim .

0.592 g of calcium oxalate was dissolved in dilute acid and the solution was made up to 250 mL. 25 mL of this solution required 8.375 mL of 0.1 N KMnO_4 solution for complete oxidation. Calculate the percentage of calcium oxalate in calcium oxalate sample.

20 mL of a H_(2)O_(2) solution after acidification required 20 mL of N/10 KMn O_(4) solution for complete oxidation. Calculate the percentage and volume strength of H_(2)O_(2) solution.

0.3 g of an oxalate salt was dissolved in 100 ml solution. The solution required 90 m! of N/20KMnO_4 for complete oxidation. The % of oxalate ion in salt is