A base has a pH of 8.5. What is the concentration of OH- ions in the solution?
To find the concentration of OH- ions, we first need to calculate the concentration of H+ ions in the solution using the formula:
pH = -log[H+]
Given that the pH is 8.5, we can calculate the concentration of H+ ions as follows:
8.5 = -log[H+]
[H+] = 10^(-8.5)
[H+] = 3.16 x 10^(-9) M
Since water undergoes auto-ionization to form H+ and OH- ions in equal concentrations, the concentration of OH- ions in the solution is also 3.16 x 10^(-9) M.