Achieve Week 3 #2

Moderators: Chem_Mod, Chem_Admin

Amanda Nguyen dis 2E
Posts: 102
Joined: Fri Sep 24, 2021 6:36 am

Achieve Week 3 #2

Postby Amanda Nguyen dis 2E » Sat Jan 15, 2022 11:40 pm

The Ka of a monoprotic weak acid is 0.00340. What is the percent ionization of a 0.109 M solution of this acid?
I used Ka = x^2/(.109-x) and solved the quadratic x^2 + .0034x - .003706 to get x=0.0592 and used 0.0592/.109 x 100% to get a percent ionization of 54.3%, however that's incorrect? Does anyone know where I went wrong?

Devika Nair 2D
Posts: 108
Joined: Fri Sep 24, 2021 5:51 am
Been upvoted: 1 time

Re: Achieve Week 3 #2

Postby Devika Nair 2D » Sun Jan 16, 2022 12:21 pm

Your c value is -0.003706, but 0.00340(-0.109) is -0.0003706! Just missing a zero.


Return to “Equilibrium Constants & Calculating Concentrations”

Who is online

Users browsing this forum: No registered users and 13 guests