1.) i would like to know if this is right What is the reaction that occurs when calcium oxide is added to water? is it : CaO + H2o --> Ca(OH)2 and the second question which i have no idea to is.. Consider the buffer equilibrium: HF(aq) + H2O(l) ---> H30(aq) + F(negative)(aq) the HF has high conc. The H3O has low conc. and the F has high conc. Using le Chat's principle, what happens to the pH of the buffer solution when a small amount of NaOH is addeD?! thanks a bunch u guys!