Determining Weak or Strong Bases/Acids

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Isabel Gandarilla
Posts: 9
Joined: Wed Sep 21, 2016 2:56 pm

Determining Weak or Strong Bases/Acids

Postby Isabel Gandarilla » Tue Nov 22, 2016 2:00 pm

How do we determine whether an acid/base is considered weak or strong?

And is there a specific threshold on the PH scale that determines whether an its weak or strong?

Brianna Wummer 2L
Posts: 19
Joined: Wed Sep 21, 2016 2:56 pm

Re: Determining Weak or Strong Bases/Acids

Postby Brianna Wummer 2L » Tue Nov 22, 2016 2:15 pm

Hi there! In lecture on Monday, we learned that there are two properties that make an acid strong/weak. Strong acids lose H+ easily and form very stable anions. In addition, if you are given an acidity or basicity constant, you know that the acid or base is weak because it did not completely ionize in the solution. Also, inorganic acids are usually stronger than organic acids, although there are exceptions. Lastly, regarding the pH scale, i think an acid with a pH < 3 is considered strong and a base with a pH > 12.5 is considered strong. Hope that helps!

Ann Zhang_1M
Posts: 25
Joined: Wed Sep 21, 2016 2:59 pm

Re: Determining Weak or Strong Bases/Acids

Postby Ann Zhang_1M » Wed Nov 23, 2016 10:07 am

To determine whether an acid or a base is strong or weak, you need to know whether it ionizes completely.
Here's a list of strong acids and bases from http://www.austincc.edu/chemlab/strongacidbase

Elisse Albian 3D
Posts: 4
Joined: Fri Jul 15, 2016 3:00 am

Re: Determining Weak or Strong Bases/Acids

Postby Elisse Albian 3D » Sat Nov 26, 2016 12:19 pm

There is also a list on page 163 of the course reader.

Marisa_Woo_2G
Posts: 24
Joined: Wed Sep 21, 2016 2:56 pm

Re: Determining Weak or Strong Bases/Acids

Postby Marisa_Woo_2G » Sat Nov 26, 2016 2:43 pm

To add on, most organic acids and bases (with carbon) are generally weak acids and bases.


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