a. As the hydronium ion concentration increases, the pH starts to alter the chemical properties of the water molecules. stays constant. goes down. starts to affect the OH- concentration. Cannot determine from the information provided. gets larger. b. As the pH increases, the hydroxide ion concentration None of these answers is correct starts to affect the hydronium concentration. goes down. stays constant. starts to decrease because it is reacting with the excess hydronium ions. gets larger. c. When a hydronium ion concentration equals 1 x 10-10 moles per liter, what is the pH of the solufion