Ferrous sulphate is assayed by which titration
Answers
Answer:
Ferrous sulfate dissolve about 0.3 g, accurately weighed, in a mixture of 30 mL of water and 20 mL of sulfuric acid (~100 g/l) TS and titrate with ceric ammonium sulfate (0.1 mol/l) VS, using 2 drops of o-phenanthroline TS as indicator.
Answer:
Ferrous sulfate is an example of reducing agent and this titration is an example of redox titration. KMnO4 is a powerful oxidant.
To estimate the amount of ferrous sulphate dissolved in 750 ml of the given unknown solution volumetrically. For this you are given with a standard solution of ferrous ammonium sulphate (FAS) of normality 0.1102 N and potassium permanganate solution as link solution.
Ferrous Ammonium Sulphate Solution Preparation
1)Dissolve 40 g of ferrous ammonium sulfate in a previously cooled mixture of 40 ml of sulphuric acid and 200 ml of water.
2)Dilute with sufficient freshly boiled and cooled water to produce 1000 ml.
3)Standardize the solution in the following manner