Water Chemistry & Equilibria Flashcards
1
Q
pH
A
-log[H+] (concentration of protons)
2
Q
Keq (water)
A
([H+][OH-])/[H2O]
3
Q
Kw
A
10^-14 M^2 = [H+][OH-]
4
Q
pKw
A
pH + pOH = 14 = -log[H+] + -log[OH]
5
Q
Ka
A
association constant; determines acid strength
Ka = ([H+][A-])/[HA] (H+ = conj acid; A- = conj base)
6
Q
pKa
A
-logKa
7
Q
buffer properties
A
resist pH changes; often weak acids with conjugate base
8
Q
Tris & HEPES
A
common buffers
