Chapter 15, Problem 57GQ

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074

Chapter
Section

### Chemistry & Chemical Reactivity

10th Edition
John C. Kotz + 3 others
ISBN: 9781337399074
Textbook Problem

# Hemoglobin (Hb) can form a complex with both O2 and CO. For the reactionHbO2(aq) + CO(g) ⇄ HbCO(aq) + O2(g)at body temperature, K is about 200. If the ratio [HbCO]/[HbO2) comes close to 1, death is probable. What partial pressure of CO in the air is likely to be fatal? Assume the partial pressure of O2 is 0.20 atm.

Interpretation Introduction

Interpretation:

The partial pressure of CO in the reaction of complex formation with haemoglobin in the air that is likely to be fatal has to be determined.

Concept Introduction:

Equilibrium constant in terms of pressure[Kp]: Equilibrium constant can be expressed in terms of partial pressures in atmospheres.

aA(g)+bB(g)cC(g)+dD(g)KP=PCc×PDdPAa×PBb

Explanation

Given:

HbO2â€‰â€‰(aq)+â€‰â€‰COâ€‰(g)â€‰â€‰â€‰â€‰â€‰â‡„â€‰â€‰HbCOâ€‰(aq)+â€‰â€‰O2â€‰(g)Kâ€‰â€‰â€‰â€‰â€‰=â€‰â€‰â€‰200PO2â€‰â€‰â€‰â€‰â€‰â€‰=â€‰0.20â€‰atm

For this equation:

HbO2â€‰â€‰(aq)+â€‰â€‰COâ€‰(g)â€‰â€‰â€‰â€‰â€‰â‡„â€‰â€‰HbCOâ€‰(aq)+â€‰â€‰O2â€‰(g)

Kâ€‰â€‰â€‰â€‰=â€‰â€‰â€‰[HbCO][O<

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