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Physiology 1020 Lecture Notes - Lecture 12: Respiratory Alkalosis, Respiratory Acidosis, Carbonic Anhydrase

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orchidfrog941
29 Sep 2017
School
Western University
Department
Physiology
Course
Physiology 1020
Professor
Christine Bell

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Document Summary

The hydrogen atom has a single proton (+) and a single electron (-) resulting in a neutral element. A hydrogen ion (h+) is a hydrogen atom that has lost its electron, leaving only the positively charged proton - sometimes called a proton. Acid: any molecule that will release hydrogen ions when put in a solution. Ex: hcl will dissociate into free h+ ions and cl- ions. It is the presence of the free h+ that makes a solution acidic - the more free h+, the more acidic the solution and vice versa. Strong acid: will dissociate rapidly and release large amounts of h+ in solution. Base: any molecule that will accept a hydrogen ion. Ex: bicarbonate ions (hco3-, the most important base in the body) will bind with h+ to form carbonic acid (h2co3). Bases lower the concentration of free h+ in solution by combining with the h+.

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Related Questions

When carbon dioxide dissolves in water, essentially all of itreacts to form carbonic acid, H2CO3.

CO2(g) + H2O(l) <---> H2CO3(aq)

The carbonic acid can then dissociate into H+ and bicarbonateions,

H2CO3(aq) <----> H+(aq) + HCO-3(aq).

Consider a body of otherwise pure water that is in equilibrium withthe atmosphere near sea level, where the partial pressure of carbondioxide is 3.4x10^-4 bar (or 340 ppm). Calculate the molality ofcarbonic acid and of bicarbonate ions in the water, and determinethe pH of the solution. Note that even "natural" precipitation issomewhat acidic.

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Here is some data from the back of the book that I think isimportant, anything else that is needed let me know.
G(CO2)(g) = -394.36kJ
G(H2O)(l) = -237.13kJ
G(H2CO3)(aq) = -623.08kJ
G(H+)(aq) = 0kJ
G(HCO3-)(aq) = -586.77kJ

If anybody has any idea how to do this problem, any input isappreciated.