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The percentage of available chlorine in ...

The percentage of available chlorine in a commercial sampleof bleaching powder is

A

`52.9%`

B

`55.9%`

C

`58%`

D

`60%`

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The correct Answer is:
B
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Calculate the percentage of available chlorine in a sample of 3.55g of bleaching powder which was dissolved in 100mL of water. 25mL of this solution, on treatment with KI and dilute acid, required 20 mL of 0.125 N sodium thiosulphate solution.

What is the percentage of chlorine in a good sample of bleaching power?

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.

In a given sample of bleaching powder, the precentage of available chlorine is 49. The volume in litres of chlorine obtained if 20 g of the sample is treated with HCI at NTP is?

Auto-oxidation of bleaching powder gives:

Auto-oxidation of bleaching powder gives:

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

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. The chemical name of bleaching powder is

RESONANCE ENGLISH-EQUIVALENT CONCEPT & TITRATIONS-Exercise -1 (Part-II)
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  15. A 0.2 g sample containing copper (II) was analysed iodometrically, whe...

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