pH, pKa and Buffers Flashcards
1
Q
What is the (H+) of pure water
A
10^-7 mol.L^-1
2
Q
What is the dissociation constant (Kd)
A
(Kd) = (H+)(OH-)/(H2O)
3
Q
What is (Ka)
A
The dissociation of acids- the tendency og an acid (HA) to donate (H+)
4
Q
What is pKa?
A
pKa= -logKa
It allows the calculation of the ratio of unprotonated : protonated acid at any PH
5
Q
Does a strong or weak acid display a larger Ka value
A
A strong acid
6
Q
Does a strong or weak acid display a larger pKa value
A
A weak acid. pKa becomes smaller with increasing acid strength.
7
Q
Does an amino acid act as an acid or a base
A
It can act as both as the carboxyl group donates (H+) = Acid
and the amino acid group can accept (H+) = Base
