A milkman adds a very small amount of baking soda to fresh milk.

(a) Why does he shift the pH of the fresh milk from 6 to slightly alkaline?


(b) Why does this milk take a long time to set as curd?

(a) The milkman shifts the pH of the fresh milk from 6 to alkaline so that in basic form, it will not spoil easily.

(b)This milk takes a long time to set as curd because the lactic acid produced reacts with the baking soda and gets neutralized.


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