How to Prepared and Standardize of 0.05 N Zinc Sulfate Volumetric Solution

How to Prepared and Standardize of 0.05 N Zinc Sulfate Volumetric Solution

                                                        

Preparation of 0.05 N Zinc Sulfate Volumetric solution

➤ Glass ware and instruments required.

Beaker, Glass stirrer, Graduated Pipettes, Graduated cylinder, Analytical balance, Sucker, Volumetric flask,Conical Flask, Burette, Fume hood.

➤ Reagents required.

Zinc Sulfate

Molecular Wt. :- ZnSO4,7H2O, 287.53

Edeatate disodium Volumetric Solution

Dithizone Solution Indicator.

➤ Preparation.

Weigh 14.4 g zinc sulfate reagent grade in 1000 ml volumetric flask. Dissolve in sufficient water by warming, cool and dilute up to the mark with water. Filter the solution, if it is not clear.

➤ Standardization.

Pipette out 25ml of 0.05 M Edeatate disodium VS in to a 250 ml conical flask, and add, in the order given, 25ml of acetic acid-ammonium acetate buffer solution, 50 ml  of alcohol, and 2 ml of dithizone solution . Titrate with the zinc sulphate solution to clear, rose-pink colour. Note this final end point as burette reading in ml.

➤ Calculations.

          ml, Edeatate disodium x Molarity of Edeatate disodium

M = -----------------------------------------------------------------------

                                          ml  ZnSO₄