3 posts • Page 1 of 1
I'm confused on how to find [OH-] from only knowing [H30+]. In problem 6B.9, when [H3O+] is 1.5M, the answer for [OH-] is supposed to be 1.5 x 10^-14 but I keep getting 6.67 x 10^-15. What I'm doing is taking Kw = [H3O+][OH-] and then dividing [H3O+] on each side but it gets me the wrong answer.
What the solutions manual is doing is converting the [OH-] concentration to pOH, finding pH by subtracting pOH from 14, and then calculating [H3O+] by using the pH value. This method will result in a different result if the concentration of H3O+ or OH- exceeds 1 M.
Who is online
Users browsing this forum: No registered users and 5 guests