How to Prepared and Standardize of 0.1 N Ferrous Ammonium Sulfate volumetric Solution
Preparation of 0.1 Ferrous Ammonium Sulfate Volumetric solution
➤ Glass ware and instruments required.
Beaker, Glass stirrer, Graduated Pipettes, Graduated cylinder, Analytical balance, Sucker, Volumetric flask, Burette, Conical Flask, Fume hood.
Beaker, Glass stirrer, Graduated Pipettes, Graduated cylinder, Analytical balance, Sucker, Volumetric flask, Burette, Conical Flask, Fume hood.
➤ Reagents required.
Ferrous Ammonium sulfate Reagent Grade,
Molecular Wt. :- Fe(NH4)2(SO4)2,
6H2O, 392.14,
Potassium dichromate,
Sulphuric Acid.
Ferroin Solution
➤ Preparation.
Weigh about 39 g ferrous ammonium sulfate reagent grade into
1000 ml volumetric flask containing about 400 ml water. Add 20 ml of conc. sulfuric
and and make up to the mark.
➤ Standardization.
Pipette out 10 ml std Potassium dichromate (K2Cr2O7).
Acidify by adding 10 ml Sulphuric Acid (H2SO4) and titrate with Ferrous
Ammonium Sulfate by adding 2 to 4 drops of ferroin solution as an indicator. End
point is yellow to reddish black.
➤ Calculations.
Volume of K2Cr2O7
solution, ml x 0.2500
N / M=
----------------------------------------------------------------------
Volume FAS used in titration [Burette reading in ml ]
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