Moderators: Chem_Mod, Chem_Admin

Jacinda Wollenweber 1D
Posts: 22
Joined: Wed Nov 16, 2016 3:02 am


Postby Jacinda Wollenweber 1D » Tue Aug 01, 2017 7:41 pm

Rank solutions in order of increasing pH:

a)1.0x10^-5M HCl (aq)
b)0.20M CH3NH3Cl (aq)
c)0.20M CH3COOH (aq)
d)0.20M C6H5NH2 (aq)

I noticed that there were no calculations done in the solution manual, so is this solely based on the properties of weak acids/bases and strong acids/bases?

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

Re: 12.67

Postby Chem_Mod » Wed Aug 02, 2017 12:30 am

Answer choices B (weak acid), C (weak acid), and D (weak base) are weak so you can calculate their pH using a regular ICE box.

Answer choice A is a strong acid so its pH is simply -log(0.00005)

Therefore, we know A must have the lowest pH and D must have the highest pH, but to compare B and C, use an ICE box.

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

Who is online

Users browsing this forum: No registered users and 1 guest