(T Suem CST by 4 water molecules and has a light pink color. When high concentra
ID: 565510 • Letter: #
Question
(T Suem CST by 4 water molecules and has a light pink color. When high concentrations of chloride ion are introduced, a cobalt-chloride complex ion forms that has a distinctive blue color One way to represent this equilibrium is Cock (ag)Cota)+4 CI (ag) An experiment was run to demonstrate that a dynamic equilibrium exists between these two ions. Starting with a special form of Coc4 (aq) where one of the chloride ions was isotopically labeled C6CI used instead of the naturally occuring isotopes), the system was then allowed to reach equilibrium. 2 CI CI ClIC reaction is reached and then cease. Under this condition which of the structures below would be observed for Coci12Explanation / Answer
1) If the equilibrium is not dynamic, then the forward reaction would run giving the products. The products are Co2+ and Cl- ions. Since the equilibrium is not dynamic, the products do not re-combine back to yield the starting material. Hence, the structure of the starting material will be the same as what we started with and this is represented by (A).
2) If the equilibrium is dynamic, then both the forward and the reverse reactions proceed at equal pace. The Cl- ion can combine with Co2+ in a number of ways and hence, all the structures denoted as (A), (B), (C) and (D) are possible.
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