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Aquatic Respiration
Chemistry of Oxygen Solubility
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  Studying the Chemistry of Oxygen Solubility



The solubility of gases in water is controlled by several principles. In this lesson you read about the various principles and explore the principles through computer animation. After the computer animations you investigate a WOW lake ecosystem to further understand oxygen supersaturation.

Knowledge Base
Complete the WOW Reading on the chemistry of oxygen solubility. Your instructor will present a series of computer animations related to the reading.

Experimental Design
Hypothesize what conditions in lakes could cause supersaturation.
1. What clues in a lake that might indicate that 02 supersaturation is occurring?

Data Collection
Examine the Ice Lake oxygen and temperature profiles in the corresponding Excel file for January 2, 1999 and July 2, 1999.
2. What are your observations for each date?

Data Management and Analysis
Construct a graph of the oxygen and temperature profiles. Overlay a profile for 100% 02 saturation using the table provided from Wetzel, 1983.
3. Return to the oxygen data for Lake Independence. Do you note any patterns in the time of day and depths at which oxygen supersaturation occurs?

Interpretation of Results
4. At what time of year would you expect 02 supersaturation to occur? Why?

5. Would you expect supersaturation to occur in lakes of all types? Why or why not?

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date last updated: Monday December 13 2004