Disolved oxygen enviromental chemistry question?
September 24, 2009
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The amount of dissolved in a body of water would be affected by any of the following: an increase in water temperature an increase in the surface area of the water in contact with air, an increase in the number of plants in the water an increase in the number of animals a.Which of the following changes would lead to a decrease in DO b.Which of these changes would lead to an increase in Dissolved oxygen
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Increase in water temperature – reduces the DO
Increase in surface area of water in contact with air – increases DO
Increase in the number of plants in the water – increases DO since O2 is a product of photosynthesis
Increase in the number of animals – decreases DO since bacteria use O2 to break down the waste (feces, etc).