Question

When cobalt chloride is added to pure water, the Co2+ions hydrate. The hydrated form then reacts with the Cl-ions to set up the equilibrium shown here:
Co(H2O)62++ 4Cl-CoCl42-+ 6H2O
(pink) (blue)
Which statement describes the change that the system will undergo if potassium chloride is added?
A) It should become more pink.
B) Nothing will change.
C) The silver ion will react with the CoCl42-.
D) Water will be produced.
E) It should become more blue.

Answer

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