Sorry, I did make an error when I posted the earlier question:

It should have said:
A solution has [OH-] = 2.0 x 10-^14 M. The [H+] in this solution is?

I hope you can help. Thank you. Sorry about the earlier error.

1 answer

[H^+](OH^-] = Kw = 1E-14
You have OH^- and Kw, solve for H^+