Question

Q:- a milkman adds a very small amount of baking soda to fresh milk.
a) why does he shift the pH of fresh milk from 6 to slightly alkaline?
b) why does this milk take a long time to set as curd?
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Answer 1

Explanation:

a) when the milkman added baking soda to the milk , milk turns slight alkaline because baking soda is alkaline in nature, show the pH of milk shifted from 6 to slightly alkaline.

b) the milk takes long time to set a curd because after adding the baking soda to the milk it turns alkaline which neutralizes the acid produced to set the curd, hence it takes time.