Question

The pink and blue species below form a violet colored mixture at equilibrium and the reaction is endothermic

[CO(H₂O)₆]²⁺ (aq)    + 4 Cl^- (aq)  ⇌  [COCl₄]^2-(aq) + 6H₂O(l)

(pink)                                                (blue)

To produce more pink aqua complex [CO(H₂O)₆]²⁺ (aq) you should

	A.	Use a hot water bath
	B.	Use an ice water bath
	C.	Add more [CO(H2O)6]2+ (aq)
	D.	Remove water

Answer 1

Solution :-

Reactant complex [CO(H2O)6]^2+ has pink color

Therefore to produce the more pink aqua complex we need to shift the reaction equilibrium to left side.

The reaction is endothermic that means it requires heat to proceed in the forward direction and it will give off heat in the reverse direction.

Therefore if we remove the heat by using the ice water bath then it will shift the equilibrium to left side.

Using the hot water bath will help to shift the equilibrium to right side

Adding more [CO(H2O)6]^2+ will shift the equilibrium to right side

Removing water will shift equilibrium to right side

Therefore the answer is use a ice water bath which will shift equilibrium to left side.

Therefore the answer is option B