Requirements (Instruments, Chemicals & Other) :

1. Burette
   
2. Measuring cylinder
   
3. Pipette – 10ml
   
4. Beaker/Conical flask
   
5. 0.1N NaOH solution
   
6. Phenolphthalein indicator solution
   

Procedure :

1. Take 10ml milk sample in a conical flask.
   
2. Add few drops of Phenolphthalein in the sample.
   
3. Fill the burette with 0.1 N standard NaOH solution and titrate sample till the appearance of pink colour.
   
4. Note down the amount of titrant used to reach end point
   
5. Calculate using formula: