Weak Acid/Base vs. Strong

Moderators: Chem_Mod, Chem_Admin

Louis Zhao 4C
Posts: 30
Joined: Sun Oct 07, 2018 12:17 am

Weak Acid/Base vs. Strong

Postby Louis Zhao 4C » Sun Dec 02, 2018 1:19 pm

What is the best way to differentiate between a strong acid/base and a weak acid/base. For example how do we know ammonia is a weak base while sodium hydroxide is a strong base and acetic acid is a weak acid while HCl is a strong acid.

Germar G 4F
Posts: 38
Joined: Fri Sep 28, 2018 12:28 am

Re: Weak Acid/Base vs. Strong

Postby Germar G 4F » Sun Dec 02, 2018 1:33 pm

The strength of an acid or base is defined by the extent of dissociation it has in water. So if it is completely dissociated, then it can be considered a strong base/acid. However, if it is partially dissociated, then it will be a weak acid/base.

Tiffany_Cacy_3D
Posts: 70
Joined: Fri Sep 28, 2018 12:24 am

Re: Weak Acid/Base vs. Strong

Postby Tiffany_Cacy_3D » Sun Dec 02, 2018 1:48 pm

If it does completely dissociate in water how do you actually tell when this happens? Is there a way to tell how much it will dissociate?

sameeksha_panda_3h
Posts: 31
Joined: Fri Sep 28, 2018 12:25 am

Re: Weak Acid/Base vs. Strong

Postby sameeksha_panda_3h » Sun Dec 02, 2018 7:05 pm

For the purposes of this class, I wouldn't worry too much about figuring out which bases/ acid is stronger because the best way of "figuring it out" would be experimentally. You may be able to have an idea of how much an acid/ base would dissociate based on electronegativity differences though.

Minsub Lee 3E
Posts: 32
Joined: Fri Sep 28, 2018 12:25 am

Re: Weak Acid/Base vs. Strong

Postby Minsub Lee 3E » Sun Dec 02, 2018 7:27 pm

For this class, a good way to differentiate between strong acids/bases from weak acids/bases is by memorizing the strong ones. Only a few acids and bases are strong. If you do not recognize the acid as a strong acid, it is most likely a weak acid.

Divya Pimparkar 1E
Posts: 30
Joined: Fri Sep 28, 2018 12:19 am

Re: Weak Acid/Base vs. Strong

Postby Divya Pimparkar 1E » Sun Dec 02, 2018 8:59 pm

It's honestly easier to memorize the strong acids and bases so when you have to identify the acids and bases, it will be quicker to recognize which are strong or weak.

Danny Elias Dis 1E
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

Re: Weak Acid/Base vs. Strong

Postby Danny Elias Dis 1E » Sun Dec 02, 2018 9:20 pm

Can strength be measured by dissociation in a solvent other than water?

Sang Hyoun Hong 3G
Posts: 31
Joined: Fri Sep 28, 2018 12:27 am

Re: Weak Acid/Base vs. Strong

Postby Sang Hyoun Hong 3G » Mon Dec 03, 2018 12:45 am

Just like others have said, it is much easier to memorize the strong acids and bases to differentiate


Return to “Lewis Acids & Bases”

Who is online

Users browsing this forum: No registered users and 1 guest