Preparation and standardization of 0.1 N Silver Nitrate USP Volumetric Solution
1. PREPARATION :
Dissolve about 17.5 g of Silver Nitrate in 1000 ml of water.
2. STANDARDISATION :
Transfer about 100 mg accurately weighed, of reagent grade Sodium Chloride, previously dried at 110°C for 2 hours, to a 150 ml beaker, dissolve in 5 ml of water, and add 5 ml of Acetic acid, 50 ml of Methanol and about 0.5 ml of Eosin Y TS. Stir, preferably with a magnetic stirrer, and titrate with the Silver Nitrate solution.
Normality (N) = [Weight of NaCl (in mg)]/[Titration Reading (in ml) x 58.44]
Limit : 0.1 N ± 5 % (0.0950 N – 0.1050 N)
3. PREPARATION OF INDICATORS / REAGENTS :
a. Eosin Y TS (adsorption indicator):
Dissolve 50 mg of Eosin Y in 10 ml of water.
4. STORAGE CONDITION :
Store in glass-stoppered bottles.