mistake on SK practice exam

[robert zellmer]

Someone asked about #20 on the AU17_CHEM1220_MT1_Practice_SK.pdf
practice midterm.  The question asks for the pH of a 3.0 x 10^-8 HBr 
solution.
The correct answer is not given.  It should be 6.94.

This is a very dilute strong acid problem.  You can't ignore the H+ from the
autoionization of water as we usually do.  Try problem 16.106 in the 
textbook
before trying this.

Dr. Zellmer