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The answer is D, but please explain why that is. When cobalt chloride is added t

ID: 500352 • Letter: T

Question

The answer is D, but please explain why that is.

When cobalt chloride is added to pure water, the Co^2+ ions hydrate. The hydrated form then reacts with the Cl^- ions to set up the equilibrium shown here: Co(H_2O)_6^2+ + 4Cl^- CoCl_4^2- + 6H_2O Which statement accurately describes the change that the system will undergo if water is added? a. The color will become more blue. b. The equilibrium will shift to the right. c. More water will be produced. d. More chloride ions will be produced. e. There will be less of the hydrated cobalt ion at the new equilibrium position.

Explanation / Answer

Q19.

if we add H2O, then:

clearly, the products have H2O, so the right side increases, therefore, according to le chatelier, the cunterbalance is the shift toward the left, i.e. left must increase

a)

color will become pink since shift goes toward it

b)

false, shift goes to the left

c)

false, the left side has no water

d)

Cl- is in the left, this is true

e)

false, actually, the hydrate must increase in concentration since it is shifted to this side

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