strong vs weak acids

Moderators: Chem_Mod, Chem_Admin

Jane Burgan 1C
Posts: 73
Joined: Fri Sep 28, 2018 12:15 am

strong vs weak acids

Postby Jane Burgan 1C » Thu Dec 06, 2018 11:38 pm

What's the difference when you're calculating the pH of a strong versus a weak acid? I'm very confused with the Ka and the pKa equilibrium and how to calculate the pH when you're given a certain number of grams of a molecule and the molarity of it in a solution.

Mona Lee 4L
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

Re: strong vs weak acids

Postby Mona Lee 4L » Thu Dec 06, 2018 11:41 pm

To calculate the pH of a weak acid solution, you need to use Ka and set up an equilibrium equation, which is beyond the scope of this quarter. For questions involving strong acids and baes, you can solve them stoichiometry as a neutralization reaction and then calculate the pH using the remaining H+ in solution.

Karan Thaker 2L
Posts: 75
Joined: Fri Sep 28, 2018 12:26 am

Re: strong vs weak acids

Postby Karan Thaker 2L » Thu Dec 06, 2018 11:43 pm

By neutralization, assume that the strong acid / base cancel each other out. While this may not happen in reality, we assume this for this course to simplify our calculations process.

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

Who is online

Users browsing this forum: No registered users and 1 guest