KtA Kt+ + A
Kt+ + A + KtOH + HA
= [KtOH] [HA] / [Kt+] [A]
KtOH Kt+ + OH
[KtOH] [HA] / [Kt+] [A]
b = Þ [KtOH] =
+ + =
= [KtOH] [HA] / [Kt+] [A] = =
, , , Ka Kb , .. Ka Kb .
Kt+ + A + KtOH + HA
(1-h) (1-h) Ch Ch
= =
, h .
=
= [KtOH] [HA] / [Kt+] [A]
[KtOH]=[HA], [Kt+] = [A] =
= [HA]2 / 2
[HA] = =
= =
=
[H+]2 =
pH = lg [+]= lg = 7 ½ lgKa + ½ lgKb =7 + ½ Ka ½ pKb
. .
. , . .
, ( -).
34 + +24
24- + +42
42- + +43
, , .. , .
, . ( 3- ). 3- .
34 24- 42- 43-
[34] + [24-] + [42-] + [43-] = C (34)
ri
=
=
=
34 + +24
C-Ca Ca
1- . ( ), a1 a2.
( )
+ + -
|
|
,
= + [A-] = [A-]
[A-] = CHA/ = ; =aC
- .
=