Weak Acids/Bases?

Moderators: Chem_Mod, Chem_Admin

Shundeen Martinez 1D
Posts: 31
Joined: Fri Sep 28, 2018 12:18 am

Weak Acids/Bases?

Postby Shundeen Martinez 1D » Fri Dec 07, 2018 1:39 pm

What would be considered a weak acid/base? And how do you know it's weak?

Rithana Srikanth 3L
Posts: 30
Joined: Fri Sep 28, 2018 12:26 am

Re: Weak Acids/Bases?

Postby Rithana Srikanth 3L » Fri Dec 07, 2018 1:56 pm

Examples of weak acids - CH3COOH, H3PO4, HF
Examples of weak bases - NH3, C5H5N, NH4OH
Weak bases are only partially protonated in solution. Most of the examples of strong/weak acids and bases you just have to memorize. However, for weak acids there are a few guidelines to distinguish them, such as the length of the A-H bond and the stability of the conjugate base.

taline_n
Posts: 64
Joined: Fri Sep 28, 2018 12:17 am

Re: Weak Acids/Bases?

Postby taline_n » Fri Dec 07, 2018 1:56 pm

I'm not too sure about bases, but acid strength is determined by bond length and stability of the anion in the compound. The longer/weaker the bond between the atoms, and the more stable the anion, the stronger the acid.

For example, HI is a stronger acid than HF because I is a larger atom than F, meaning the bond between I and H will be longer and weaker, which means it is a stronger acid.

Also, hypochlorous acid (HClO) is a stronger acid than hypoiodous acid (HOI) because Cl is more electronegative than I, therefore it is a stronger anion in the compound and results in more acidic character.

michelle
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: Weak Acids/Bases?

Postby michelle » Fri Dec 07, 2018 4:00 pm

You are supposed to remember all the strong acid and bases, according to a UA. Then the rest are all weak ones.

305117729
Posts: 30
Joined: Fri Sep 28, 2018 12:16 am

Re: Weak Acids/Bases?

Postby 305117729 » Fri Dec 07, 2018 9:44 pm

Weak acids include all organic acids.

Esther Lee 4H
Posts: 67
Joined: Fri Sep 28, 2018 12:29 am

Re: Weak Acids/Bases?

Postby Esther Lee 4H » Sat Dec 08, 2018 2:04 pm

I went to Lyndon's review session and he said its best to just memorize them

https://quizlet.com/21890142/common-str ... ash-cards/

this quizlet might be helpful


Return to “Lewis Acids & Bases”

Who is online

Users browsing this forum: No registered users and 1 guest