Henderson-Hasselbalch Equation
AP Chemistry · Flashcards · Application
AP CHEMISTRY · FLASHCARDS
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QUESTION
Find pH for
p
K
a
=
3.5
pK_a = 3.5
p
K
a
=
3.5
,
[
A
−
]
=
0.03
[A^-] = 0.03
[
A
−
]
=
0.03
M,
[
H
A
]
=
0.01
[HA] = 0.01
[
H
A
]
=
0.01
M.
QUESTION
If
[
A
−
]
/
[
H
A
]
=
2
[A^-]/[HA] = 2
[
A
−
]
/
[
H
A
]
=
2
, find pH given
p
K
a
=
7.2
pK_a = 7.2
p
K
a
=
7.2
.
QUESTION
For a buffer with
p
K
a
=
4.5
pK_a = 4.5
p
K
a
=
4.5
, what is pH when
[
A
−
]
=
0.2
[A^-] = 0.2
[
A
−
]
=
0.2
M and
[
H
A
]
=
0.1
[HA] = 0.1
[
H
A
]
=
0.1
M?
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ANSWER
pH = 4.8.
log
(
2
)
=
0.3
\text{log}(2) = 0.3
log
(
2
)
=
0.3
, so pH = 4.5 + 0.3.
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