In an aqueous chloride solution cobalt(II) exists in equilibrium with the complex ion CoCl,2. Co²"(aq) is pink and CoCl,² (aq) is blue. At Low Temperature the pink color predominates. At High Temperature the blue color is strong. If we represent the equilibrium as: CoC1,²"(aq) : Co*(aq) + 4CI'(aq)

Chemistry for Engineering Students
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Chapter12: Chemical Equilibrium
Section: Chapter Questions
Problem 12.41PAE: Because calcium carbonate is a sink for CO32- in a lake, the student in Exercise 12.39 decides to go...
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In an aqueous chloride solution cobalt(II) exists in equilibrium with the complex
ion CoCl,?. Co2"(aq) is pink and CoCl,²(aq) is blue.
At Low Temperature the pink color
predominates.
At High Temperature the blue
color is strong.
If we represent the equilibrium as: CoCl, (ag)=Co**(aq) + 4Cl(aq)
We can conclude that:
| 1. This reaction is:
A. Exothermic
B. Endothermic
C. Neutral
D. More information is needed to answer this question.
| 2. When the temperature is decreased the equilibrium constant, K:
A. Increases
B. Decreases
C. Remains the same
D. More information is needed to answer this question.
When the temperature is decreased the equilibrium concentration
|3. of Co2+:
A. Increases
B. Decreases
C. Remains the same
D. More information is needed to answer this question.
Transcribed Image Text:In an aqueous chloride solution cobalt(II) exists in equilibrium with the complex ion CoCl,?. Co2"(aq) is pink and CoCl,²(aq) is blue. At Low Temperature the pink color predominates. At High Temperature the blue color is strong. If we represent the equilibrium as: CoCl, (ag)=Co**(aq) + 4Cl(aq) We can conclude that: | 1. This reaction is: A. Exothermic B. Endothermic C. Neutral D. More information is needed to answer this question. | 2. When the temperature is decreased the equilibrium constant, K: A. Increases B. Decreases C. Remains the same D. More information is needed to answer this question. When the temperature is decreased the equilibrium concentration |3. of Co2+: A. Increases B. Decreases C. Remains the same D. More information is needed to answer this question.
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