CONCEPT PROBLEMS SET 5.docx

# CONCEPT PROBLEMS SET 5.docx - CONCEPT PROBLEMS SET 5 1 In...

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CONCEPT PROBLEMS SET 5 1. In the body, hemoglobin (Hb) is the substance responsible for transporting oxygen (O2) to tissues. Hemoglobin binds oxygen to produce oxyhemoglobin (HbO2): Hb + O2 HbO2 (1) Carbon monoxide (CO) can also bind to hemoglobin to produce carboxyhemoglobin (HbCO): Hb + CO HbCO (2) The equilibrium constant for Reaction (2), KCO, is about 210 times larger than the equilibrium constant for Reaction (1), KO2 . Thus, carbon monoxide binds to hemoglobin much more efficiently than oxygen. KCO/KO2 = 210 (3) (a) Write a balanced equation for the displacement of oxygen from HbO2 by CO to produce HbCO. Write the equilibrium constant expression for your overall reaction. (b) Write an equation that relates the equilibrium constant for the overall reaction described in part (a) to the equilibrium constants KCO and KO2 . (c) Use your balanced equation from part (a) and your knowledge of equilibrium constants to explain why patients who are experiencing CO poisoning are generally given pure oxygen as a remedy.
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