The pH value of human blood is:
Correct answer: B. 7.35
- A. 7.80
- B. 7.35
- C. 7.33
- D. 6.62
- E. 7.05
Explanation
The pH of human blood is typically maintained between 7.35 and 7.45. This range is slightly basic, as a pH of 7 is considered neutral. The body has several mechanisms to regulate blood pH tightly, including the bicarbonate buffer system. Option B, 7.35, falls within this normal range. Option A, 7.80, is too alkaline for blood, whereas Options C, D, and E (7.33, 6.62, 7.05) are too acidic, indicating varying degrees of acidosis.
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Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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