Question

A milkman add a very small amount of baking soda to fresh milk why does he shift the pH of the fresh milk from six sightly alkaline why does this milk take a long time to set a curd

Answer 1

1.because the milk may get acidic and it will not worthy to drink

2. because the milk turn basic and have more OH- ions than H+ ions and it will be difficult to make curd of it that is acidic

Answer 2

Answer:

By adding a very small amount of baking soda to fresh milk, the milkman keeps the milk unspoiled for little more time than usual time.As the pH value increases the milk turns to slightly alkaline,  As baking soda is added, it turned into a base. But curd needs acidic condition to set. Hence this milk takes a long time to set as a curd.