Question

Fresh milk has a pH of 6.6 . explain y the pH changes as it turned into curd

Answer 1

When milk changes into curd its pH will decrease. Because curd contains acid so H+ increases and thus pH will decrease.

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Answer 2

Answer:

->  Fresh Milk has a pH of 6.6.

->  But Milk turns sour when it is changed into Curd.

->  The Curd contains Lactic Acid.

->  So the pH will be less than 6 due to the presence of Lactic Acid.