Know the two principal chemical elements in organic chemical compounds
-:- Carbon & Hydrogen (maybe Oxygen)
Know the two properties that make certain types of organic chemicals highly water soluble.
-:- Polarity & Electrical Charge
Understand basically the impediments to water solubility for ...
SWS3022 Exam 3 Questions & 100% Correct
Answers- Latest Test | Graded A+ | Passed
Know the two principal chemical elements in organic chemical compounds
✓ -:- Carbon & Hydrogen (maybe Oxygen)
Know the two properties that make certain types of organic chemicals highly water soluble.
✓ -:- Polarity & Electrical Charge
Understand basically the impediments to water solubility for non-ionic hydrophobic
organic compounds.
✓ -:- a. Solubility: The ease with which substances dissolve in water; the degree to
which organic contaminants impact soil and water quality often is related to their
water solubility.
b. Non-ionic, non-polar organic chemicals do not possess an electrical charge, nor are the
polar. So they don't share any compatibility with water. Example: Dioxin
Given the relative insolubility of hydrophobic organic compounds, in what type of
✓ -:- a. Move out of aqueous phases and into that organic colloids/soils. Why we still
have issues with DDT today.
b. Soils as well as sediments in lakes and rivers often accumulate organic matter.
c. Hydrophobic organics become stored in these organic domains that naturally occur in
aquatic and terrestrial systems. This protects them from degradation and increases their
lifetime in the environment.
d. Most synthetic organic chemicals, particularly those like PCBs and DDT are very
persistent in the environment. They remain for decades.
Know what an octanol-water partitioning coefficient is, how it is determined, and what high
or low numbers indicate with respect to the ability of organic chemicals to bioaccumulate
or persist in the environment.
✓ -:- a. Kow= conc. of org. chem in octanol/ conc. of org. chem in water.
b. A high octanol-water partitioning coefficient generally corresponds to low water
solubility and strong attraction to carbon matrices. It indicateds a strong interaction with
organic solvents and potentially, soil O.M.
Know what an organic carbon partitioning coefficient (Koc) is, how it is calculated, and how
it relates to the movement of organic chemicals including pesticides through soils.
4|Page | Grade A+| 2024/2025
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