- Use Le Chatelier's Principle to answer the questions about the following reversible reaction: 204 (g) = 2NO2 (g) a. If the concentration of N204 is increased, what will happen to the equilibrium of the reaction? Will it shift in the reverse direction to favor the formation of N204, will it shift forward to favor the formation of NO2, or will it stay the same? b. You are observing this reaction in a closed container. What will happen to the equilibrium if you increase the pressure inside the container? Will it shift in the reverse direction to favor the formation of N204, will it shift forward to favor the formation of NO2, or will it stay the same?

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1. Use Le Chatelier's Principle to answer the questions about the following reversible reaction:
N204 (g) = 2N02 (g)
a. If the concentration of N2O4 is increased, what will happen to the equilibrium of the
reaction? Will it shift in the reverse direction to favor the formation of N2O4, will it
shift forward to favor the formation of NO2, or will it stay the same?
b. You are observing this reaction in a closed container. What will happen to the
equilibrium if you increase the pressure inside the container? Will it shift in the
reverse direction to favor the formation of N2O4, will it shift forward to favor the
formation of NO2, or will it stay the same?
2. The reaction you will be manipulating in this experiment is:
[Co(H20)6]2+ (aq) + 4Cl (aq) = [CoCl4]² (aq) + 6H2O (I)
[Co(H20)6]2+ is a metal complex that forms a pink solution when mixed with water, while a
solution of [CoCl4]2- has a blue color. You will monitor the reaction according to the color of
the reaction mixture.
a. Write an expression for the K of this reaction. Note that this is a heterogeneous
reaction.
b. Read the instructions for Part A of week 1. What "stress" are you placing on the
reaction as you compare test tubes "a" through "e"? Would you expect this stress to
shift the reaction in the forward direction or in the reverse?
C. Read the instructions for Part B of week 1. What "stress" are you placing on the
reaction as you compare test tubes "f" through "j"? Would you expect this stress to
shift the reaction in the forward direction or in the reverse?
d. In Part C of week 1, you will observe how temperature affects equilibrium. If a
reaction is endothermic, how would you expect increasing temperature to shift the
equilibrium? Wwhat if a reaction is exothermic?
3. Review Beer's Law. You have a 2.5 M aqueous sample of a metal ion, which has an
absorbance of 0.75 at 660 nm. An unknown solution of the same metal ion, on the same day
and on the same spectrophotometer, has a measured absorbance of 0.59. What is the
concentration of metal ion in the unknown solution?
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Transcribed Image Text:CHE 221-222 Lab.. • Saved - A Katlyn File Home Insert Draw Design Layout References Mailings Review View Help Be careful-files from the Internet can contain viruses. Unless you need to edit, it's safer to stay in Protected View. PROTECTED VIEW Enable Editing 1. Use Le Chatelier's Principle to answer the questions about the following reversible reaction: N204 (g) = 2N02 (g) a. If the concentration of N2O4 is increased, what will happen to the equilibrium of the reaction? Will it shift in the reverse direction to favor the formation of N2O4, will it shift forward to favor the formation of NO2, or will it stay the same? b. You are observing this reaction in a closed container. What will happen to the equilibrium if you increase the pressure inside the container? Will it shift in the reverse direction to favor the formation of N2O4, will it shift forward to favor the formation of NO2, or will it stay the same? 2. The reaction you will be manipulating in this experiment is: [Co(H20)6]2+ (aq) + 4Cl (aq) = [CoCl4]² (aq) + 6H2O (I) [Co(H20)6]2+ is a metal complex that forms a pink solution when mixed with water, while a solution of [CoCl4]2- has a blue color. You will monitor the reaction according to the color of the reaction mixture. a. Write an expression for the K of this reaction. Note that this is a heterogeneous reaction. b. Read the instructions for Part A of week 1. What "stress" are you placing on the reaction as you compare test tubes "a" through "e"? Would you expect this stress to shift the reaction in the forward direction or in the reverse? C. Read the instructions for Part B of week 1. What "stress" are you placing on the reaction as you compare test tubes "f" through "j"? Would you expect this stress to shift the reaction in the forward direction or in the reverse? d. In Part C of week 1, you will observe how temperature affects equilibrium. If a reaction is endothermic, how would you expect increasing temperature to shift the equilibrium? Wwhat if a reaction is exothermic? 3. Review Beer's Law. You have a 2.5 M aqueous sample of a metal ion, which has an absorbance of 0.75 at 660 nm. An unknown solution of the same metal ion, on the same day and on the same spectrophotometer, has a measured absorbance of 0.59. What is the concentration of metal ion in the unknown solution? Page 115 of 155 2 of 37707 words D Focus 目 97%
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