2.4. Chemical Oxygen Demand (COD)

Try these first

1. 1.

   What does COD stand for?

   Hint

   Think about the oxygen consumption in water.

2. 2.

   Name one oxidizing agent used to measure COD.

   Hint

   It's a strong acid often used in chemistry labs.

3. 3.

   What is the primary purpose of measuring COD?

   • To measure dissolved oxygen
   • To assess organic load
   • To determine pH levels

   Hint

   Remember what COD stands for.

4. 4.

   True or False: Higher BOD values indicate a higher presence of non-biodegradable materials.

   • True
   • False

   Hint

   Think about the definitions of BOD and COD.

5. 5.

   Suppose a researcher finds a COD level of 1200 mg/L in a river sample. What steps should be recommended based on this analysis?

   Hint

   Consider what high COD levels indicate about pollution.

6. 6.

   Design an experiment to determine the relationship between industrial discharge and changes in COD levels downstream. What factors would you need to consider?

   Hint

   Think about how to effectively measure changes in water quality.