posted by Amber .
The hydronium ion concentration for a solution is determined to be
4.5 x 10^-7 M. What is the concentration of the hydroxide ion?
I just wanted to let the people that are being nice enough to help me know that this is for a study guide. It is not a test or quiz. :0) Thanks.
(H^+)(OH^-) = Kw = 1E-14