What makes a weak acid?

Moderators: Chem_Mod, Chem_Admin

ColmConnolly3D
Posts: 87
Joined: Wed Sep 30, 2020 10:06 pm
Been upvoted: 1 time

What makes a weak acid?

Postby ColmConnolly3D » Sun Jan 17, 2021 9:04 pm

Hi all,

On exams, will we be specifically told when we are dealing with a "weak" acid or base? I have a hard time with memorization, so I dont want to memorize the strong acids table unless I need to.

Thanks in advance!
Colm

Sara_Lim_2C
Posts: 86
Joined: Wed Sep 30, 2020 9:55 pm

Re: What makes a weak acid?

Postby Sara_Lim_2C » Sun Jan 17, 2021 9:06 pm

From my knowledge the only real specification for a weak acid (other than that it doesn't fully dissociate) is that it's not one of the strong ones :/ unfortunately I think memorizing the strong acids the way to go because I don't think we'll be told if they're strong or weak.

ColmConnolly3D
Posts: 87
Joined: Wed Sep 30, 2020 10:06 pm
Been upvoted: 1 time

Re: What makes a weak acid?

Postby ColmConnolly3D » Sun Jan 17, 2021 9:08 pm

Ok, thanks for the help Sara! I'll make a quizlet :(

605291562
Posts: 86
Joined: Wed Sep 30, 2020 10:07 pm

Re: What makes a weak acid?

Postby 605291562 » Sun Jan 17, 2021 9:09 pm

Hi! I think we should be able to recognize weak acids and bases based on similarities and patterns (for example COOH often indicates a weak acid) which does take a little bit of memorization, but with the more practice you get they become easier to see.

305572629
Posts: 86
Joined: Wed Sep 30, 2020 9:41 pm

Re: What makes a weak acid?

Postby 305572629 » Sun Jan 17, 2021 9:14 pm

Weak acids consist of all acids besides the 7 strong acids. Additionally, it may help to remember that the conjugate acid of a strong base is a weak acid in some cases.

Ranen_Chang_2G
Posts: 43
Joined: Wed Nov 25, 2020 12:21 am

Re: What makes a weak acid?

Postby Ranen_Chang_2G » Sun Jan 17, 2021 9:53 pm

Essentially, you would just need to memorize the list of strong acids, since strong bases have the hydroxide groups.

Bai Rong Lin 2K
Posts: 86
Joined: Wed Sep 30, 2020 9:54 pm

Re: What makes a weak acid?

Postby Bai Rong Lin 2K » Sun Jan 17, 2021 9:56 pm

I think it is good to remember how to determine strong and weak acids.

Mansi Solanki 3A
Posts: 86
Joined: Wed Sep 30, 2020 9:55 pm
Been upvoted: 1 time

Re: What makes a weak acid?

Postby Mansi Solanki 3A » Sun Jan 17, 2021 9:57 pm

I think that for this course, Dr. Lavelle specified that anything that is not on the list of strong acids would be considered a weak acid, so it might be better to try to remember which ones are strong instead of those that are weak. One of the best methods that I found for memorizing besides using flash cards or quizlet is to write down what kind of acid something is in a homework problem that has a chemical equation involving acids and bases to get more familiar with them over time.

Abraham De Luna
Posts: 79
Joined: Sat Sep 14, 2019 12:16 am

Re: What makes a weak acid?

Postby Abraham De Luna » Sun Jan 17, 2021 10:53 pm

It is probably recommended that you just remember what the strong and weak acids are.

Ethan Laureano 3H
Posts: 87
Joined: Wed Sep 30, 2020 9:58 pm

Re: What makes a weak acid?

Postby Ethan Laureano 3H » Sun Jan 17, 2021 11:21 pm

It is best to memorize as I think it is difficult to derive from knowing the qualifications. That being said, a weak acid will not lose hydrogen protons easily. Additionally, a weak acid will not result in a stable anion. And weak acids typically have short, strong bonds.

Gustavo_Chavez_1K
Posts: 87
Joined: Wed Sep 30, 2020 9:46 pm

Re: What makes a weak acid?

Postby Gustavo_Chavez_1K » Sun Jan 17, 2021 11:31 pm

Yeah I would say that the memorizing the list of strong acids and strong bases would help out a lot for this. Since if they are not on the list then they are automatically considered weak. Well weak in comparison to the listed strong acids and bases.

Emily Tieu 2K
Posts: 38
Joined: Thu Jan 07, 2021 12:17 am

Re: What makes a weak acid?

Postby Emily Tieu 2K » Sun Jan 17, 2021 11:51 pm

If it is not one of the 7 strong acids, the acid is generally considered weak. I think it's best to memorize the list, including the strong bases.


Return to “Equilibrium Constants & Calculating Concentrations”

Who is online

Users browsing this forum: No registered users and 1 guest