10 g of bleaching power on reaction with KI required 50 mL of 2N hypo solution. Thus, `%` of bleaching poweder is

10 g of bleaching powder on reaction with KI required 50 mL of 2N hypo solution. Thus, % of bleaching powder is

0.96 g of HI were heated to attain equilibrium 2HIhArrH_(2)+I_(2) . The reaction mixture on titration requires 15.7mL of N//10 hypo solution. Calculate degree of dissociation of HI .

10 ml of H_(2)O_(2) solution on treatment with Kl and titration of liberated l_(2) required 20 mL of 1 N hypo solution. What is the normality of H_(2)O_(2) solution ?

5g of a sample of bleaching powder is treated with excess acetic acid and KI solution. The liberated I_(2) required 50 mL of N/10 hypo. The % of available chlorine in the sample.

Bleaching power is a mixed salt of hydrochloric acid and hypochlorious acid. It has the formula, CaOCI_(2).H_(2)O . It is manuafactured by the action of chlorine on dry slaked lime at 40^(@)C . There is also a view that bleaching power is a mixture [Ca(OCI)_(2)+CaCI_(2).Ca(OH)_(2).H_(2)O] . The amount of chlorine obtained form a sample of bleching power by the treatement with excess of dilute acids or CO_(2) is called a available chlorine. A good sample of bleaching power constains 35-38% of available chlorine. On long standing, it undergoes auto-oxidation and the amount of acvailable chlorine decreases. The estimation of available chlorine is done volumetrically by (a) iodometric method or by (b) aresenite method. In textile industry, the cotton cloth is mainly bleached with the help of bleaching power. The percentage of available chlorine in commercial samples of bleaching poweder is usually between 35% and 38% . The low value is due to