Product Application

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.