Consider the reversible reaction: A+B=C+D What happens to the forward and reverse reaction rates when equilibrium is achieved? What happens to the reactant (A and B) and product (C and D) concentrations when equilibrium is achieved? LeChâtelier's Principle states that if a stress is applied to a reversible reaction at equilibrium, the reaction will undergo a shift in order to re-establish its equilibrium. Consider the following exothermic reversible reaction at equilibrium: 2 A=B+C In which direction (left or right) would the following stresses cause the system to shift? a. The concentration of A is decreased. b. The concentration of B is increased. c. The temperature of the system is lowered.

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Pre-Lab Problems
Consider the reversible reaction:
A +B=C+D
What happens to the forward and reverse reaction rates when equilibrium is achieved?
What happens to the reactant (A and B) and product (C and D) concentrations when equilibrium is
achieved?
LeChâtelier's Principle states that if a stress is applied to a reversible reaction at equilibrium, the
reaction will undergo a shift in order to re-establish its equilibrium. Consider the following
exothermic reversible reaction at equilibrium:
2 A=B+C
In which direction (left or right) would the following stresses cause the system to shift?
a. The concentration of A is decreased.
b. The concentration of B is increased.
c. The temperature of the system is lowered.
In this lab you will explore the effect of Lechatelier's Principle on two different systems at
equilibrium.
3.
Part I: Cobalt Complex
Co(H,0) (aq) + 4 CI-(aq) CoCl (aq) + 6 H,0 (4)
pink
blue
2.
Transcribed Image Text:Pre-Lab Problems Consider the reversible reaction: A +B=C+D What happens to the forward and reverse reaction rates when equilibrium is achieved? What happens to the reactant (A and B) and product (C and D) concentrations when equilibrium is achieved? LeChâtelier's Principle states that if a stress is applied to a reversible reaction at equilibrium, the reaction will undergo a shift in order to re-establish its equilibrium. Consider the following exothermic reversible reaction at equilibrium: 2 A=B+C In which direction (left or right) would the following stresses cause the system to shift? a. The concentration of A is decreased. b. The concentration of B is increased. c. The temperature of the system is lowered. In this lab you will explore the effect of Lechatelier's Principle on two different systems at equilibrium. 3. Part I: Cobalt Complex Co(H,0) (aq) + 4 CI-(aq) CoCl (aq) + 6 H,0 (4) pink blue 2.
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