What will happen when temperature is increased for this reaction which is purple at equilbrium?
Blue: CoCI4^2- + 6H2O ↔ Pink: Co(H2O)6^2+ + 4CI ΔH = -ve (exothermic)
Color of system will turn from purple to pink
Color of system will turn from purple to blue
No change in color; it will remain purple
When the temperature is increased for the given reaction that is purple at equilibrium, the system will shift in the direction of the reaction that releases heat, which is the forward reaction. As the forward reaction occurs, more Co(H2O)6^2+ complex ions will be formed, leading to an increase in the concentration of the pink form. Therefore, the color of the system will turn from purple to pink.
