Class 12 Chemistry Practicals Volumetric Analysis Estimation Of Ferrous Ammonium Sulphate

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AIM:
 
To estimate the amount of Ferrous Ammonium Sulphate (FAS) dissolved in 1500 ml of the given unknown solution volumetrically. For this you are given with a standard solution of ferrous sulphate (FeSO4) of normality 0.1024 N and Potassium Permanganate as link solution.
 
PRINCIPLE :
 
During these titrations, Fe2+ ions (from ferrous salts) are oxidised to Fe3+ ion and MnO4- ion (from KMnO4) ion reduced to Mn2+ ion.
 
Class 12 Chemistry Practicals Volumetric Analysis Estimation Of Ferrous Ammonium Sulphate
 
PROCEDURE:
 
TITRATION – I: Std FeSO4 Vs link KMnO4:
 
Burette is washed with water, rinsed with KMnO4 solution and filled with same KMnO4 solution up to zero mark. Exactly 20ml of the FeSO4 solution is pipetted out into the clean, washed conical flask. To this FeSO4 solution, approximately 20ml of 2N H2SO4 is added. This mixture is titrated against KMnO4 link solution from the burette. KMnO4 is added drop wise till the Appearance of permanent pale pink colour. The burette reading is noted, the same procedure is repeated to get concordant values.
 
TITRATION – II: Link KMnO4 Vs Unknown FAS:
 
Burette is washed with water, rinsed with KMnO4 solution and filled with same KMnO4 solution up to zero mark. Exactly 20ml of the unknown FAS solution is pipetted out into the clean, washed conical flask. To this FAS solution, approximately 20ml of 2N H2SO4 is added. This mixture is titrated against KMnO4 link solution from the burette. KMnO4 is added drop wise till the Appearance of permanent pale pink colour. The burette reading is noted, and the same procedure is repeated to get concordant values.
 

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CBSE Class 12 Chemistry Study Material: Volumetric Analysis Estimation Of Ferrous Ammonium Sulphate

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