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.