Chem 101
American University of Health Sciences
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Expt#7. Dissolved Oxygen Level in Natural Waters CHEM 101
- Exam (elaborations) • 8 pages • 2022
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CHM 101 Experiment 7 
Dissolved Oxygen Levels in Natural Waters 
Objectives 
 To learn the chemical reactions involved in fixing and analyzing water sample for 
dissolved oxygen using Winkler method. 
 To determine the dissolved oxygen concentration of a natural water sample. 
Introduction 
The aesthetic appearance of bodies of water such as the color, surface growth and odor 
indicate an immediate perception of the quality of water. Other parameters give clear 
description of the quality of a w...
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