The pH of human blood is maintained between:
Correct answer: A. 7.35 to 7.45
- A. 7.35 to 7.45
- B. 7.55 to 7.65
- C. 7.00 to 7.25
- D. 7.85 to 7.95
Explanation
Blood is normally slightly basic, with a normal pH range of about 7.35 to 7.45. Usually, the body maintains the pH of blood close to 7.40. This is because most enzymes present in the blood have their optimum pH in this range.
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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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