Textbook 6A.23

[Jose-Joaquin Garcia 1K]

Hey so I found the concentration of Barium ions that agrees with the textbook by just dividing the moles by the volume of the container. How would I go about solving for the concentrations of hydroxide and hydronium though? I’m not exactly sure if I need to make a balanced equation with H2O as a solvent or not. Any guidance is greatly appreciated.

[Freddy_Gold 3A]

For this, since Ba(OH)₂ is a strong base, it would fully dissociate. It is important to remember here that there are 2 OH^- for every one Ba(OH)₂, so the concentration of OH^- is twice that of Ba(OH)₂. Then, using [H₃O⁺]x[OH^-]=1x10^-14, we can find the concentration of H₃O⁺, and then take the -log([H₃O⁺]) to get pH.