gen Chem page 7 Flashcards
1
Q
auto ionization of water
A
Kw= [H+] [OH-] = 10^-14 at 298 K
2
Q
pkw=
A
14
3
Q
pH=
A
pH=-log [H+]
= log 1/[H+]
4
Q
[H+]=
A
10^ -pH
5
Q
pH + pOH=
A
14
6
Q
Ka=
A
acid diss constant Ka= [H+] [A-]/ [HA]
ka= x^2/M acid initial
7
Q
Kb=
A
base diss constant Kb= [OH-] [B+]/[BOH]
Kb= x^2/ M base initial
8
Q
ka x kb at 298K =
A
Kw
9
Q
equivalence point =
A
NV=NV
10
Q
henderson hasselbalch equation acid buffer
A
pH= pKa + log [A-]/[HA]
11
Q
basic buffer
A
pOh= pKb + log [B-]/[BOH]
12
Q
if the ratio the A-: HA or B-: BOH stays the same, but still changes
A
the numbers don’t change but the buffering capacity does change
13
Q
strong acid
A
small pKa, large Ka
14
Q
strong base
A
small pKb, large Kb
15
Q
ph= 7 is neutral
A
only at 298K
