Lecture 3 - Water and buffers Flashcards
1
Q
Polarity with water
A
More polar molecules have a higher interaction with water and so are hydrophilic
2
Q
Entropic effect: what is it?
A
The water around hydrophobic molecules has reduced mobility
3
Q
When is pH (and pKa) lower/higher
A
Lower for a stronger acid/higher dissociation in water
4
Q
Henderson-Hasselbalch equation
A
pH = pKa + log(Ac⁻/HAc)
5
Q
When does pH = pKa?
A
When Ac⁻=HAc
6
Q
Amphipathic molecules: what are they?
A
Molecules that are simultaneously hydrophobic and hydrophilic
7
Q
When does a buffer solution occur?
A
When the pKa value = the pH value
