Properties of Buffers
AP Chemistry · Flashcards
AP CHEMISTRY · FLASHCARDS
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QUESTION
Calculate the pH of a buffer with
[
HA
]
=
0.10
[\text{HA}] = 0.10
[
HA
]
=
0.10
M,
[
A
−
]
=
0.10
[\text{A}^-] = 0.10
[
A
−
]
=
0.10
M,
p
K
a
=
4.75
pK_a = 4.75
p
K
a
=
4.75
.
QUESTION
What is the relation between
K
a
K_a
K
a
and buffer strength?
QUESTION
Which solution is a buffer: NaOH/NaCl or NH₄Cl/NH₃?
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ANSWER
NH₄Cl/NH₃. NH₄⁺/NH₃ is a weak acid/base pair; NaOH/NaCl is not.
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