The normal pH of blood is 7.40 ± 0.05 and is controlled in

Chapter 20, Problem 81P

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Problem 81P

The normal pH of blood is 7.40 ± 0.05 and is controlled in part by the H2CO3/HCO3– buffer system.

(a)   Assuming that the Ka value for carbonic acid at 25°C applies to blood, what is the [H2CO3]/[HCO3–] ratio in normal blood?

(b)   In a condition called acidosis, the blood is too acidic. What is the [H2CO3]/[HCO3–] ratio in a patient whose blood pH is 7.20?

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