In an aqueous chloride solution cobalt (II) exists in equilibrium with the complex ion CoCl4^2-• Co^2+ (aq) is pink and CoCl4^2-(aq) is blue.
If we represent the equilibrium as: CO^2+(aq) + 4Cl^-(aq) ⇌ CoCl4^2- (aq)
We can conclude that:
1. This reaction is:
D. More information is needed to answer this question.