The PH of Blood Is 7

question 51

Multiple Choice

The pH of blood is 7.35. It is maintained in part by the buffer system composed of carbonic acid (H₂CO₃) and the bicarbonate (hydrogen carbonate, HCO₃^-) ion. What is the ratio of [bicarbonate]/[carbonic acid] at this pH? For carbonic acid, K_a1 = 4.2 × 10^-7.

• A) [bicarbonate]/[carbonic acid] = 0.11
• B) [bicarbonate]/[carbonic acid] = 0.38
• C) [bicarbonate]/[carbonic acid] = 2.65
• D) [bicarbonate]/[carbonic acid] = 9.4
• E) None of these choices are correct.

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Definitions:

Subduction

The process along a convergent plate-tectonic boundary in which an oceanic lithospheric plate descends beneath the overriding plate.

Tectonics

Earthquakes, volcanoes, and other processes that deform Earth’s crust and mantle; syn. tectonic activity.

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