Chloride Test Titrant

Procedure: 

. 20 drops of sample water was take in a dry test tube with a calibrated pipette. 

. Adjusting the pH of the solution to 7-10 by adding 1 drop of NaOH or H2SO4. 

. Adding 2 drops of potassium chromate indicator to the tube. 

. With another pipette add silver nitrate solution drop wise, stirring the solution till the colour turns permanent reddish tinge. 

. Count the number of drops of silver nitrate solution. 

Calculation: 

Volume of silver nitrate = no. of drops x drop value of the pipette = V1 

Normality of silver nitrate = N1 

Volume of water = no. of drops of water x drop value of the pipette = V2 

Amount of chloride (mg/L) = V1 x N1 x 35.450 x 1000/V2