Lecture 3 PART 1 - fate of xenobiotics in an organism
5.0(1)
Studied by 5 people
Knowt Play
Learn
Practice Test
Spaced Repetition
Match
FlashcardsCard Sorting
1/32
There's no tags or description
Looks like no tags are added yet.
Study Analytics
Name | Mastery | Learn | Test | Matching | Spaced |
|---|
No study sessions yet.
33 Terms
1
New cards
What is the structure of a molecule? (description)
multiple bindings, aromatic circle
2
New cards
What reduces biodegrability in a molecule structure?
Halogenation
3
New cards
What is the binding and polarity of C-H?
Covalent non-polar
4
New cards
What is the binding and polarity of C-O-N?
Covalent polar
5
New cards
How does the covalent polar bond affect solubility in water?
The solubility increases
6
New cards
Solid to gas process?
Sublimation
7
New cards
Gas to solid process?
Deposition
8
New cards
At what ATM is the triple point of water?
0\.006ATM
9
New cards
Vapour pressure definition?
The pressure of the vapour above a liquid surface
10
New cards
What is the equilibrium vapour pressure an indication of?
evaporation rate
11
New cards
What is the critical point?
When the vapour density is equal to liquid density
12
New cards
What is it called when the relative humidity is 100%?
Dew point
13
New cards
What happens when the vapour pressure exceeds the thermodynamic equilibrium?
Condensation
14
New cards
What is solubility dependent on?
Pressure, temperature, polarity of solvent and solute
15
New cards
What are the 3 options when mixing liquids?
1) They mix, 2) They mix to a certain concentration, 3) Substances do not mix
16
New cards
What is an example of mixed liquids?
Ethanol + water
17
New cards
What is an example of mixed liquids to a limited concentration?
diethyl ether
18
New cards
What is an example of non-mixed liquids?
Toluene + water
19
New cards
What is LNAPL?
Light non-aqueous phase liquid?
20
New cards
How does LNAPL act in contact with water?
Floats on water
21
New cards
What is DNAPL?
Dense non-aqueous phase liquid
22
New cards
How does DNAPL act in contact with water?
Stays at bottom
23
New cards
In what environment do acid gases better dissolve?
alkaline environments
24
New cards
What bonds do gases usually form?
Unstable covalent
25
New cards
What is the partition coefficient?
Ratio of equilibrium concentrations od a dissolved substance in a two-phase system
26
New cards
What is logKow
chemical’s conc in n-octanol/conc in water
27
New cards
What is logKoc
conc in soil/conc in water
28
New cards
How do substances with high logKow sorb into organic matter?
faster, high polarity, lipophilic
29
New cards
How do substances with high logKoc sorb into soil?
Heavy sorption
30
New cards
Define adsorption
Accumulation of molecules on surface
31
New cards
Define absorption
penetration of molecules
32
New cards
Define desorption
movement of molecules back from solid to original
33
New cards
What happens when the concentration of LogKoc is *low*?
very mobile, release easily into other components
Note 
Flashcards (27)