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Question
Chemistry
Among the following acids which has the lowest pKa value ?
Q. Among the following acids which has the lowest
p
K
a
value ?
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245
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Aldehydes Ketones and Carboxylic Acids
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A
C
H
3
C
H
2
COO
H
0%
B
(
C
H
3
)
2
C
H
—
COO
H
40%
C
H
COO
H
40%
D
C
H
3
COO
H
20%
Solution:
Out of the given acids, strongest is
H
COO
H
. (highest
K
a
value)
Since
p
K
a
=
−
l
o
g
K
a
Thus lowest
p
K
a
is of
H
COO
H
.