What happens when H2O is added to this reaction at equilibrium?

Question

What happens when H2O is added to this reaction at equilibrium?

Blue: CoCI42- +6H2O ↔ Pink: Co(H2O)62+ +4CI-
Position of equilibrium will shift to left
Color of system will turn from blue to pink
Color of system will turn pink to blue
Equilibrium shift to left to reduce the added H2O

Answer 1

When H2O is added to this reaction at equilibrium, the position of equilibrium will shift to the left. This is because the addition of water increases the concentration of reactants on the left-hand side of the equation. As a result, the equilibrium will shift to the left to reduce the added H2O, favoring the formation of the reactants and reducing the formation of the products. Therefore, the color of the system will turn from pink to blue as the concentration of Co(H2O)62+ decreases and the concentration of CoCI42- increases.