If the equilibrium is NOT dynamic the forward reaction would simply run until eq

Question

If the equilibrium is NOT dynamic the forward reaction would simply run until equilibrium is reached and then cease. Under this condition which of the structures below would be observed for CoCl42- ?

Please explain! Thank you!

An experiment was run to demonstrate that a dynamic equilibrium exists between these two ions. Starting with a special form of CoCl42-(aq) where one of the chloride ions was isotopically labeled (36Cl used instead of the naturally occuring isotopes), the system was then allowed to reach equilibrium. 0 CI C If the equilibrium is NOT dynamic the forward reaction would simply run until equilibrium is reached and then cease. Under this condition which of the structures below would be observed for CoC14? If the equilibrium IS dynamic the forward and reverse reactions run even after equilibrium is reached. Under this condition which of the structures below would be observed for CoC14? Put letters in alphabetical order. If none are correct enter NONE A. 36 CI CI 0 0 CI C CI C CI C 0 0 36 CI 36C Cl

Explanation / Answer

Equilibrium studies with isotopically laebelled atom

For the given equilibrium systems

[COCl4]^2-

of which one Cl is isotopically labelled

Now,

If the equilibrium is not dynamic : no exchange os isotopic Cl with other Cl in the molecule would occur : A.

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If the equilibrium is dynamic, rapid exchange os isotopic label would occur with other Cl : A, B, C, D

All four structures may be possible here.

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