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Ionic Equilibrium II
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Acid-base titration curves and indicators
JEE Main level
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Difficulty 2 of 3
ia133
25.0
mL
of
0.100
M
CH
X
3
COOH
(
p
K
a
=
4.74
) is titrated with
0.100
M
NaOH. The pH after
10.0
mL
of NaOH has been added is
A
4.74
B
4.92
C
1.37
D
4.56
Answer: D
C
H
3
COOH
initially
2.5
mmol
; NaOH
1.0
mmol
gives
1.0
mmol
acetate and
1.5
mmol
acid left.
pH
=
4.74
+
lo
g
(
1.0/1.5
)
=
4.56
.
Practice Ionic Equilibrium II
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