Preparation and Standardisation of 0.01 M Lead Nitrate BP Volumetric Solution
Dissolve 3.3 g of Lead (II) nitrate in sufficient water to produce 1000 ml.
To 50 ml of 0.01M Lead nitrate solution add 300 ml of water and introduce into 500 ml conical flask. Add about 50 mg of Xylenol orange triturate & hexamethylenetetramine until solution becomes violet pink colour. Titrate with 0.01M Disoidum edetate until the violet-pink colour changes to yellow.
Each ml of 0.01 M Disodium edetate VS is equivalent to 3.312 mg of Pb(NO3)2.
Molarity (M) = (Molarity of 0.01 M Disodium edetate x Titration reading)/ Volume of 0.01 M Lead nitrate taken
Limit: 0.01 M ± 5 % (0.0095 M – 0.0105 M)
3. PREPARATION OF INDICATORS / REAGENTS:
a. Xylenol orange triturate:
Triturate 1 part of Xylenol orange with 99 parts of Potassium nitrate.
b. 0.01M Disoidum edetate:
4. STORAGE CONDITION:
Store in glass-stoppered bottles.