2.3. Reagents
Hydrochloric acid (1 M) was prepared by appropriate dilution
of concentrated acid (Sp. gr. 1.18) with water and further diluted
to get 0.1 M HCl. A 5% solution of H2O2 was prepared
by diluting suitable volume of the commercially available reagent
to 100 ml with water in a volumetric flask. Sodium
hydroxide solution (1 M) was prepared by dissolving required
amount of the pellets in water.