How to prepare 0.1% active chlorine

Bleaching powder as a Sanitizer and some chemistry

1. How to prepare 0.1% Active Chlorine Lets discuss ‘Bleaching powder as a Sanitizer and some chemistry’ SHREE MALLIKARJUN & Shri Chetan Manju Desai College Canacona Goa

2. Bleaching powder and its solution is toxic -Refer to MSDS of hypochlorite -Less than 4 ppm is usually present in drinking water supply

3. Bleaching powder (SOLID) Calcium hypochlorite -Ca( Cl O ) 2 = 142.91 g Active Chlorine % = = 49.61 % Calcium chloride hypochlorite Ca( Cl O )Cl = 126.91 g Active Chlorine % = = 27.93 %  

4. Bleaching powder = Calcium hypochlorite Ca( Cl O ) 2 + Calcium chloride hypochlorite Ca( Cl O )Cl % of Chlorine 50 - 27 % Theoretically!

5. 0.1 % A ctive C hlorine solution from commercial beaching powder If 100 g of bleaching powder has 33% active chlorine 100 g in 100 mL water give 33 % active chlorine 100 g in 100 mL will give ~30 % 30 g in 100 mL will give 10 % 30 g in 1000 mL will give 1 % 30 g in 10 L will give 0.1 % solution 3 g in 1000 mL 3000 mg in 1000 mL (1 mg in 1000 mL -1 ppm) 3000 ppm solution

6. No weighing scale?

7. Liquid bleaching solution Solution of hypochlorite Sodium hypochlorite – Na Cl O 74.44 g – 35.45 g % 5 by weight = 5 g in 100 mL = 2.38 g in 5 g = ~2.4% in 100 mL 100 mL diluted to 1000 mL 0.24% 100 mL dilute to 2 L ~0.12%