Chemistry
10th Edition
ISBN: 9781305957404
Author: Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher: Cengage Learning
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Transcribed Image Text:A chemical engineer is studying the following reaction:
BF3(aq) + NH3(aq) → BF3NH₂(aq)
At the temperature the engineer picks, the equilibrium constant K for this reaction is 1.9.
с
The engineer charges ("fills") three reaction vessels with boron trifluoride and ammonia, and lets the reaction begin. He then measures the composition of the
mixture inside each vessel from time to time. His first set of measurements are shown in the table below.
Predict the changes in the compositions the engineer should expect next time he measures the compositions.
reaction
vessel
A
B
с
compound
BF
3
NH3
BF₂NH₂
BE 3
NH3
BF, NH3
BF3
NH3
BF3NH₂
concentration
0.65 M
0.70 M
0.88 M
0.03 M
0.07 M
1.06 M
0.04 M
0.08 M
1.05 M
expected change in concentration
↑ increase
↑ increase
↑ increase
↑ increase
↑ increase
↑ increase
↑ increase
↑ increase
↑ increase
↓ decrease
↓ decrease
↓ decrease
↓ decrease
↓ decrease
↓ decrease
↓ decrease
decrease
↓ decrease
X
(no change)
(no change)
(no change)
(no change)
(no change)
(no change)
(no change)
(no change)
(no change)
S
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