Calculating Equilibrium Concentrations
AP Chemistry · Flashcards · Application
AP CHEMISTRY · FLASHCARDS
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QUESTION
Find
K
c
K_c
K
c
for the reaction
2
A
⇌
B
+
C
2A \rightleftharpoons B + C
2
A
⇌
B
+
C
if
[
A
]
=
0.5
M
[A] = 0.5M
[
A
]
=
0.5
M
,
[
B
]
=
1
M
[B] = 1M
[
B
]
=
1
M
,
[
C
]
=
1
M
[C] = 1M
[
C
]
=
1
M
.
QUESTION
Identify the equilibrium expression for the reaction
N
2
(
g
)
+
3
H
2
(
g
)
⇌
2
N
H
3
(
g
)
N_2(g) + 3H_2(g) \rightleftharpoons 2NH_3(g)
N
2
(
g
)
+
3
H
2
(
g
)
⇌
2
N
H
3
(
g
)
.
QUESTION
Calculate
K
c
K_c
K
c
for
H
2
+
I
2
⇌
2
H
I
H_2 + I_2 \rightleftharpoons 2HI
H
2
+
I
2
⇌
2
H
I
with
[
H
2
]
=
1
M
[H_2] = 1M
[
H
2
]
=
1
M
,
[
I
2
]
=
1
M
[I_2] = 1M
[
I
2
]
=
1
M
,
[
H
I
]
=
2
M
[HI] = 2M
[
H
I
]
=
2
M
.
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ANSWER
K
c
=
4
1
K_c = \frac{4}{1}
K
c
=
1
4
.
K
c
=
[
H
I
]
2
[
H
2
]
[
I
2
]
=
2
2
1
×
1
=
4
K_c = \frac{[HI]^2}{[H_2][I_2]} = \frac{2^2}{1 \times 1} = 4
K
c
=
[
H
2
]
[
I
2
]
[
H
I
]
2
=
1
×
1
2
2
=
4
.
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