15.4.1. Kuchli kislotani kuchli asos bilan titrlash egrisi
HCl + NaOH = NaCl + H
2
O
0,1n 0,1n
1). Dastlabki xolat ishqor qo‘shilmagan NaOH = O.
rN= –lgC
HCl
= lg0,1 = –lg1
.
10
-1
=1
V
HCl
– V
NaOH
Ekviv nuqtagacha C
HCl
= --------------------- . 0,1 =
V
HCl
+V
NaOH
2). 50 ml NaOH
100 – 50
C
HCl
= --------------- . 0,1 = 0,33 = 3,3
.
10
-2
pH= 2 – lg3,3 = 1,5
150
3). 90 ml NaOH pH= 2,3
4). 99,98 ml NaOH pH= 4,2
5). Ekv.
nuqtada muxit neytral
pH= 7,0
Ekv. nuqtadadan keyin
V
NaOH
– V
HCl
10
-14
C
NaOH
= --------------------- . 0,1 [H
+
] = -------------
V
NaOH
+V
HCl
C
NaOH
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