Integrated SequencePhysics Chemistry Organic Biology

Web Resources

University of British Columbia - The Common Ion Effect
Excellent series of examples for an important MCAT topic.

Purdue University - How To Adjust the Concentration of an Ion
Excellent example of adjusting pH to control weak electrolyte solubility, a very common type of scenario on the MCAT.



  click if a link is broken



Special points of emphasis

Chemical Thermodynamics and the Equilibrium State

Solutions

The solubility of many salts of weak acids (carbonates, phosphates, acetates, sulfides, etc) are dependent on the hydrogen ion concentration. The lower the pH, the higher the solubility because the acid-base equilibrium becomes coupled with the solution process of the electrolyte.

High hydrogen ion concentration drives the formation of the conjugate acid of the anion, which, in turn, reduces the anion concentration in solution. As LeChatelier's principle would predict, this drives the solution process forward. This is why vinegar (acetic acid) can be used to clean calcium carbonate scale from coffee pots.




Solutions

Acids and Bases

Proteins

The Respiratory System

Carbon dioxide combines chemically with water to form carbonic acid. Carbon dioxide transport in the blood and tissues involves the complex coupled equilibria between the solubility of carbon dioxide gas in water and the formation of carbonic acid coupled with the diprotic acid-base equilibrium with carbonic acid, carbonate and bicarbonate. Hemoglobin also binds carbon dioxide, so that figures in too.







The WikiPremed MCAT Course is a free comprehensive course in the undergraduate level general sciences. Undergraduate level physics, chemistry, organic chemistry and biology are presented by this course as a unified whole within a spiraling curriculum.

Please read our policies on privacy and shipping & returns.  Contact Us.
MCAT is a registered trademark of the Association of American Medical Colleges, which does not endorse the WikiPremed Course.


Creative Commons License
The work of WikiPremed is published under a Creative Commons Attribution Share Alike 3.0 License. There are elements of work here, such as a subset of the images in the archive from WikiPedia, that originated as GNU General Public License works, so take care to follow the unique stipulations of that license in printed reproductions. You can use the resources here for commercial or non-commercial purposes, but please give attribution and a link to the production credits and edit history of the resource. For the works here which began as my individual work, please attribute "John Wetzel, an author at wikipremed.com".