In the first reaction, two different colored Co(II) complex ions, [Co(H2O)6]2+ and [CoCl4]2-, exist together in equilibrium in solution in the presence of chloride ions:
[Co(H2O)6]2+(aq)(pink) + 4Cl-(aq) ⇌ [CoCl4]2-(aq)(blue) + 6H2O(l)
If this is an endothermic reaction. Predict what will happen the reaction tube is put in hot water.
a. There would be no change
b. The equilibrium will move to the left.
c. Forming more pink complex.
d. [Co(H2O)6]2+concentration decreases.