Podcast
Play an AI-generated podcast conversation about this lesson
Questions and Answers
Which unit is commonly used to express the chemical oxygen demand (COD)?
Which unit is commonly used to express the chemical oxygen demand (COD)?
- Pounds per gallon (lb/gal)
- Kilograms per liter (kg/L)
- Milligrams per liter (mg/L) (correct)
- Grams per liter (g/L)
What can a COD test be used to quantify in water?
What can a COD test be used to quantify in water?
- The amount of organic compounds in water (correct)
- The amount of inorganic compounds in water
- The amount of pollutants in water
- The amount of oxygen in water
What is the most common application of COD?
What is the most common application of COD?
- Quantifying the amount of pollutants in surface water (correct)
- Quantifying the amount of inorganic compounds in surface water
- Quantifying the amount of oxygen in surface water
- Quantifying the amount of organic compounds in surface water
What is the basis for the COD test?
What is the basis for the COD test?
Signup and view all the answers
What is the equation that represents the amount of oxygen required to oxidize an organic compound to carbon dioxide, ammonia, and water?
What is the equation that represents the amount of oxygen required to oxidize an organic compound to carbon dioxide, ammonia, and water?
Signup and view all the answers
Flashcards are hidden until you start studying
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.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
