6B.9 7th Edition

Moderators: Chem_Mod, Chem_Admin

paytonm1H
Posts: 74
Joined: Fri Sep 28, 2018 12:18 am

6B.9 7th Edition

Postby paytonm1H » Thu Dec 06, 2018 12:04 pm

This problem gives you a table of varying [H30+], [OH-], pH, and pOH values and you are asked to fill in the rest.

The first line gives the [H30+] concentration as 1.50 mol/L. When plugging that into -log[H30+], I get -0.176, however, the answer key says that the pH is 0.176 (positive). Can someone please help find where I am making a mistake?

Thanks!

Chem_Mod
Posts: 18400
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 435 times

Re: 6B.9 7th Edition

Postby Chem_Mod » Thu Dec 06, 2018 9:38 pm

Well, -log(1)=0 and -log(10)=-1, so anything between 1-10 for [H+] should be negative. The manual probably is missing a negative.


Return to “Calculating pH or pOH for Strong & Weak Acids & Bases”

Who is online

Users browsing this forum: No registered users and 0 guests