Calculate the % of available chlorine in the sample in a sample of 3.35 gm of bleaching powder which was dissolved to 100 ml water. 25 ml of this solution on treatment react with KI and dilute acid. Required 20 ml 0.125 N Hypo solution (Sodiumthiosulphate- Na2S2O3).

Related Questions:

(1) What are the Antichlor ?

(2) If 4 gm of bleaching powder dissolved to give 100 ml solution 25 ml of it react with excess of CH3COOH and KI .The Iodine liberation required 10 ml of 0.125 N Hypo solutions. Calculate % of available chlorine in the sample.

PERCENTAGE (%) AVAILABLE CHLORINE IN BLEACHING POWDER:

 

What are the Antichlor ?

An antichlor  is a substance used to decompose residual hypochlorite or chlorine after use of chlorine based bleaching , in order to prevent ongoing reactions .example s of antichlor – Sodiumbisulphite (NaHSO₃), Pottassiumbisulphite (KHSO₃) ,  Sodiummetasulphite (Na₂S₂O₃), Sodiumthiosulphate  (Na₂S₂O₃) and hydrogen peroxide (H₂O₂).

If trace of chlorine are not remove from pulp used for paper manufacturing,then on the long standing it weaken the paper and makes it yellowish. 

Related topics: 

Mole concept and Stiochiometry

MOLE-MOLE ANALYSIS

 CONCEPT OF LIMITING REAGENTS 

GRAVIMETRY-WEIGHT WEIGHT ANALYSIS

 OLEUM AND ITS PERCENTAGE(%) LABBELING

VOLUME STRENGTH OF H2O2(aq) 

 PRINCIPLE OF ATOM CONSERVATION (PAOC) 

 GRAVIMETRY-WEIGHT WEIGHT ANALYSIS 

EUDIOMETRY-VOLUME VOLUME ANALYSIS OF GAS 

DEGREE OF HARDNESS OF HARD WATER 

PERCENTAGE YIELD OF CHEMICAL REACTION: 

PERCENTAGE PURITY OF GIVEN SAMPLE:

PERCENTAGE (%) AVAILABLE CHLORINE IN BLEACHING POWDER:

 

 

If 4 gm of bleaching powder dissolved to give 100 ml solution 25 ml of it react with excess of CH3COOH and KI .The Iodine liberation required 10 ml of 0.125 N Hypo solutions. Calculate % of available chlorine in the sample.

Available chlorine in sample of bleaching powder can be calculated as per the following reactions.