Using Le Chateliers priniciple to predict the effect of the addition of sodium hyroxide to calcium hydroxide
According to Le Chatelier's principle, when a stress is applied to a system in equilibrium, the system will adjust to relieve that stress and return to its equilibrium state. In this case, let's consider the reaction between calcium hydroxide (Ca(OH)2) and sodium hydroxide (NaOH) in water:
Ca(OH)2(s) + 2NaOH(aq) → Ca(OH)2(aq) + 2NaOH(s)
Adding sodium hydroxide (NaOH) to calcium hydroxide (Ca(OH)2) means increasing the concentration of hydroxide ions (OH-) in the system. According to Le Chatelier's principle, the system will shift to consume some of the excess hydroxide ions to relieve the stress. This will cause the formation of more calcium hydroxide, resulting in an increase in the concentration of Ca(OH)2(aq).
So, the addition of sodium hydroxide to calcium hydroxide will result in the shift of the equilibrium towards the formation of more calcium hydroxide, increasing its aqueous concentration.