Ch 12.115

Moderators: Chem_Mod, Chem_Admin

Diego Zavala 2I
Posts: 65
Joined: Fri Sep 29, 2017 7:07 am
Been upvoted: 1 time

Ch 12.115

Postby Diego Zavala 2I » Thu Dec 07, 2017 3:55 pm

Acetic acid is use as a solvent for some reactions between acids and bases. a) Nitrous acid and carbonic acids are both weak acids in water. Will either of them act as a strong acid in acetic acid? Explain your answer. b) Will ammonia act as a strong or weak base in acetic acid? Explain your answer.

Is HNO2 a strong acid in acetic acid solution because HNO2 has two lone pairs which weaken the O-H bond?
I understand that NH3 will accept an H+ cation from the acetic acid solution to form NH4+, but how can I determine if it will be a strong or weak base?

Posts: 18889
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 716 times

Re: Ch 12.115

Postby Chem_Mod » Sat Dec 09, 2017 10:02 am

Hi, Diego,
You need to compare the Ka values for nitrous and acetic acid. As nitrous acid has a larger Ka, it is a stronger acid and thus will behave as an acid. Carbonic acid is a weaker acid and therefore will not act as a strong acid in acetic acid.
For ammonia, you need to compare Kb for ammonia and acetate ion. As ammonia has a larger Kb, it will behave a strong base in acetic acid.

Return to “Lewis Acids & Bases”

Who is online

Users browsing this forum: No registered users and 1 guest