Consider the following system at equilibrium: 2A (aq) + 2B(aq) = 5C(aq) Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or no shift in the direction of the net reaction. Increase [C] Decrease [A] Leftward shift Decrease [B] Increase [A] Double both [B] and [C] Double [A] and reduce [B] to one half Rightward shift Reset Increase [B] Decrease [C] No shift Help

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Chapter1: Chemical Foundations
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When a chemical reaction is at equilibrium, Q (the reaction quotient) is equal to
K (the equilibrium constant). If a stress is applied to the mixture that changes
the value of Q, then the system is no longer at equilibrium. To regain equilibrium,
the reaction will either proceed forward or in reverse until Q is equal to Konce
again. Alternatively, equilibrium can be disrupted by a change in temperature,
which changes the value of K. The result however is the same, and the reaction
will proceed forward or in reverse until Q is equal to the new K. Le Châtelier's
principle summarizes this idea:
If a stress is applied to a reaction mixture at equilibrium, a net reaction occurs in
the direction that relieves the stress.
Transcribed Image Text:When a chemical reaction is at equilibrium, Q (the reaction quotient) is equal to K (the equilibrium constant). If a stress is applied to the mixture that changes the value of Q, then the system is no longer at equilibrium. To regain equilibrium, the reaction will either proceed forward or in reverse until Q is equal to Konce again. Alternatively, equilibrium can be disrupted by a change in temperature, which changes the value of K. The result however is the same, and the reaction will proceed forward or in reverse until Q is equal to the new K. Le Châtelier's principle summarizes this idea: If a stress is applied to a reaction mixture at equilibrium, a net reaction occurs in the direction that relieves the stress.
Consider the following system at equilibrium:
2A (aq) + 2B(aq) = 5C(aq)
Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or no shift in the direction of the net reaction.
Increase [C]
Decrease [A]
Leftward shift
Decrease [B]
Increase [A]
Double both [B] and [C]
Double [A] and
reduce [B] to one half
Rightward shift
Reset
Increase [B]
Decrease [C]
No shift
Help
Transcribed Image Text:Consider the following system at equilibrium: 2A (aq) + 2B(aq) = 5C(aq) Classify each of the following actions by whether it causes a leftward shift, a rightward shift, or no shift in the direction of the net reaction. Increase [C] Decrease [A] Leftward shift Decrease [B] Increase [A] Double both [B] and [C] Double [A] and reduce [B] to one half Rightward shift Reset Increase [B] Decrease [C] No shift Help
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