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The pink and blue species below form a violet colored mixture at equilibrium: (pink) [Co(H2O)6]2+ (aq) + 4 Cl- (aq) ⇌ [CoCl4]2- (aq) + 6 H2O (l) (blue) If the concentration of [Co(H2O)6]2+ is increased, what happens to the solution? A) The concentration of [CoCl4]2- decreases. B) The concentration of [CoCl4]2- increases. C) The solution becomes colorless. D) No color change is observed.