The pH of milk is
Correct answer: D. 6.5
- A. 5.0
- B. 6.0
- C. 6.2
- D. 6.5
Explanation
The correct pH of milk is around 6.5, indicating it is slightly acidic. The pH scale ranges from 0 to 14, with values below 7 indicating acidity. Milk's slight acidity is due to the presence of lactic acid and other naturally occurring compounds. Option A (5.0) represents a more acidic solution than milk. Option B (6.0) and Option C (6.2) are closer but still slightly more acidic than typical milk. Option D (6.5) correctly reflects the average pH of milk, making it the best answer.
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About Acids, Bases and Salts
Acid and base behaviour is explained through the Bronsted-Lowry transfer of protons and the Lewis donation or acceptance of electron pairs. The topic includes pH, pOH, ionisation and water equilibrium, plus salt formation and hydrolysis, where a salt solution may become acidic, basic or neutral.
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