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5.0 g of bleaching powder was suspended ...

5.0 g of bleaching powder was suspended in water and volume made up to half a litre. 20 mL of this suspension when acidified with acetic acid and treated with excess of KI solution liberated iodine which required 20 mL of a decinormal hypo solution for titration. Calculate percentage of available chlorine in bleaching powder.

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The correct Answer is:
`35.5%`
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A 7.1 g sample of bleaching powder suspended in H_(2)O was treated with enough acetic acid and KI solution. Iodine thus liberated required 80 mL of 0.2 N hypo solution for titration. Calcutale the % of available chlorine :

10.0 g of CaOCl_2 is dissolved in water to make 200 mL solution 20 " mL of " it is acidified with acetic acid and treated with KI solution the I_2 liberated required 40 " mL of " (M)/(20)Na_2S_2O_3 solution. Find the percentage of available chlorine.

0.71 g of a sample of bleaching powder (CaOCl_2) is dissolved in 100 " mL of " water. 50 " mL of " this solution is titrated with KI solution. The I_2 so liberated required 10 mL 0.1 M Na_2S_2O_3 (hypo) solution in acidic medium for complete neutralisation. Calculate the percentage of available Cl_2 from the sample of bleaching power.

1.5 gm sample of bleaching power was suspended in water. If was treated with CH_(3)COOH followed by the addition of excess of Kl. The liberated iodine required 150 mL of (M)/(10) hypo solution for complete titration. The percentage of available chlorine in the sample is

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. 3.55 g of bleachig power when treated with acetic acid and excess of KI liberated iodine which required 60 mL of 0.5 N sodium thiosulphate solution. The percentage of available chlorine in the sample is

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