The percentage of available chlorine in ...

The percentage of available chlorine in a sample of bleaching powder, `CaOCl_(2),2H_(2)O`, is:

43.5

59.9

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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. Maximum percentage og available chlorine on the basis of CaOCI_(2).H_(2)O formula is

Oxidation state(s) of chlorine in CaOCl_(2) (bleaching powder)

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