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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: 2. When the temperature is increased the equilibrium constant, K: A. Increases B. Decreases C. Remains the same D. More information is needed to answer this question.