What are the colour designations for biomeolecules: Oxygen, Carbon, Hydrogen, Nitrogen, Sulphur
Red, grey, white, blue, yellow
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| Term | Definition |
|---|---|
What are the colour designations for biomeolecules: Oxygen, Carbon, Hydrogen, Nitrogen, Sulphur | Red, grey, white, blue, yellow |
What is directionality? | All covalent bonds are in same orientations |
Water interacts w/ itself via what bonds? | H bonds |
Are H bonds covalent or noncovalent? | non Covalent |
Describe a H bond | H is shared between two electronegative bonds |
The _______ in a H bond is the atom covalently attached to the hydrogen | Donor |
The ________ in a H bond is the electronegative atom with hybridized LP | Acceptor |
Are H bonds stronger or weaker than covalent bonds? | Weaker
- Longer |
How many H bonds are there per water molecule? | 3
~2 as acceptors
~2 as donors |
What are the 3 electrostatic forces? What is another noncovalent force? | - Ionic interactions
- H bonds
- Van der waals (DP) (LDF)
- Hydrophobic effects |
When do DP DP interactions occur? | Between polar noncharged groups
- Weaker than Hbonds |
When do LDF occur? | Between nonpolar molecules
- Weaker than DP |
List the highest to lowest electron affinities: H, S, C, N, O | O
N
C
S
H |
An atom acting as a H bond ______ will have a LP | Acceptor |
An atom acting as a H bond _______ will have a H atom bonded to strongly electronegative atom | Donor |
What does H bonding do for solubility? | Increased H bonding = Increased solubility |
What does the hydrophobic effect do to entropy? | Increase entropy of water
Decrease solvent entropy |
If nonpolar compounds aggregate together, what does it do to surface area? Entropy? | Less SA is exposed to water = Increased entropy of water |
____________ molecules experience hydrophilic interactions and the hydrophobic effect | Amphipathic |