Preparation and standardization of 0.1 M Cerium sulfate EP Volumetric Solution

1.  PREPARATION:

Dissolve 40.4 g of Cerium sulfate in a mixture of 500 mL of water and 50 mL of Sulfuric acid. Allow to cool and dilute to 1000 mL with water.

2. STANDARDISATION:

Dissolve 0.300 g of Ferrous ethylenediammoium sulfatein 50 mL of Sulfuric acid (49g/L H2SO4). Titrate with the Cerium sulfate solution determine the end point Potentiometrically or using 0.1 mL of Ferroin as indicator.

1 mL of 0.1 M Cerium sulfate is equivalent to 38.21 mg of Fe(C2H10N2) (SO4)2, 4H2O.

Calculation :

Molarity = [0.1 x weight of Ferrous ethylenediammoium sulfate  (in g)]/[0.03821 x Titration Reading (in mL)]

Limit: 0.1 M ± 5 % (0.0950 M – 0.1050 M)

3. PREPARATION OF INDICATORS / REAGENTS:

Ferroin :

Dissolve 0.7 g of Ferrous sulfate & 1.76 g of Phenanthroline hydrochloride in 70 mL of water and dilute to 100 mL with the same solvent.

4. STORAGE CONDITION:

Store in glass stoppered bottles.

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