Henderson-Hasselbalch Equation
AP Chemistry · Flashcards
AP CHEMISTRY · FLASHCARDS
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QUESTION
What is the relation between pH and
p
K
a
pK_a
p
K
a
when pH <
p
K
a
pK_a
p
K
a
?
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?
QUESTION
What does the Henderson-Hasselbalch equation assume about ionic strength?
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ANSWER
It is constant. Simplifies calculations by ignoring activity coefficients.
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