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Questions and Answers
Which unit is commonly used to express the chemical oxygen demand (COD)?
What can a COD test be used to quantify in water?
What is the most common application of COD?
What is the basis for the COD test?
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What is the equation that represents the amount of oxygen required to oxidize an organic compound to carbon dioxide, ammonia, and water?
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Study Notes
Chemical Oxygen Demand (COD)
- The unit commonly used to express COD is milligrams per liter (mg/L).
Applications of COD Test
- A COD test can be used to quantify the amount of organic compounds present in water that are oxidizable.
Most Common Application
- The most common application of COD is in wastewater treatment to measure the effectiveness of treatment processes.
Basis of COD Test
- The COD test is based on the amount of oxygen required to oxidize an organic compound to carbon dioxide, ammonia, and water.
COD Equation
- The equation that represents the amount of oxygen required to oxidize an organic compound is: COD (mg/L) = 2CrO₄²⁻ + 3H₉ CrO₄ + 2H+ → Cr³⁺ + 4H₂O + 3CO₂.
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Description
Test your knowledge on Chemical Oxygen Demand (COD) and its application in environmental chemistry. This quiz will cover topics such as measuring COD, its units of measurement, and how it is used to quantify organic content in water. Put your knowledge to the test and see how well you understand this important concept in environmental science.
