A chemical engineer is studying the following reaction: BF3(aq) + NH3(aq) → BF3NH₂(aq) At the temperature the engineer picks, the equilibrium constant for this reaction is 0.89. 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 C compound BF, NH, BF, NH, BF, NH, BF, NH, BF, NH, BF, NH, concentration 1.43 M 1.35 M 0.23 M 1.44 M 1.36 M 0.22 M 1.21 M 1.10 M 1.19 M expected change in concentration ↑ increase O decrease O↓ decrease O decrease O↓ decrease O↓ decrease O increase O † increase O increase O increase O ↑ increase O † increase O increase O increase O decrease O decrease O decrease O decrease O(no change) O (no change) O (no change) O (no change) O (no change) O (no change) (no change) O (no change) O (no change)

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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 0.89.
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
NH,
BF, NH,
BF₂
NH,
BF, NH,
BF₂
NH₂
BF, NH,
concentration
1.43 M
1.35 M
0.23 M
1.44 M
1.36 M
0.22 M
1.21 M
1.10 M
1.19 M
expected change in concentration
O ↑ increase
O ↑ increase
O ↑ increase
O ↑ increase
O † increase
O ↑ increase
O ↑ increase
O ↑ increase
O ↑ increase
O↓ decrease
decrease
decrease
O decrease
O↓ decrease
O decrease
O ↓ decrease
O ↓ decrease
O decrease
X
O (no change)
(no change)
(no change)
O (no change)
O (no change)
O (no change)
(no change)
(no change)
O (no change)
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 0.89. 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 NH, BF, NH, BF₂ NH, BF, NH, BF₂ NH₂ BF, NH, concentration 1.43 M 1.35 M 0.23 M 1.44 M 1.36 M 0.22 M 1.21 M 1.10 M 1.19 M expected change in concentration O ↑ increase O ↑ increase O ↑ increase O ↑ increase O † increase O ↑ increase O ↑ increase O ↑ increase O ↑ increase O↓ decrease decrease decrease O decrease O↓ decrease O decrease O ↓ decrease O ↓ decrease O decrease X O (no change) (no change) (no change) O (no change) O (no change) O (no change) (no change) (no change) O (no change)
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