## How to tell if something is a conjugate base/acid

Acidity $K_{a}$
Basicity $K_{b}$
The Conjugate Seesaw $K_{a}\times K_{b}=K_{w}$

Natalie Yakobian
Posts: 45
Joined: Fri Sep 25, 2015 3:00 am

### How to tell if something is a conjugate base/acid

Hello,
How do you tell if something is a congugagte base/acid?

For example CH3NH3Cl. How would I know that this is the conjugate acid of CH3NH2?
Would I just imagine the Cl dissociating and then realize that CH3NH2?

Thanks!!

Chem_Mod
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### Re: How to tell if something is a conjugate base/acid

Yes, when N has 4 things bonded to it, it has a positive charge. Therefore you can tell that the Cl- is there as a counterion and not actually bonded to the structure. The remaining positive charge on N implies it is a conjugate acid of a base with only 2H's attached to the N.