Problem 6A.19

[Rhea McKenzie 2J]

I've solved part c of this problem multiple times and keep getting [OH-] = 3.2 x 10^-15. However, the answer key states that the hydroxide concentration should be 3.2 x 10^-12. Can someone please confirm which answer is correct for me?

6A.19
Calculate the molar concentration of OH- in solutions with the following molar concentrations of H3O+:
(c) 3.1mol/L

Here is a pic of my work:

[Krishnaya Coleman Salgado 1I]

Hi!

This question in the textbook is actually written wrong. This is impossible to know on your own, but Dr. Lavelle has posted a solutions error manual on the Bruin Learn website, which I've found really helpful to look at when looking at a problem I feel really stuck on or confident in my answer but it's just not adding up. The correct molarity given is 3.1 x 10^-3 mol/L.

Hope this helps!

[Rhea McKenzie 2J]

Oh perfect, thank you!