## What is Ka2?

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

Raymond_Guan_1H
Posts: 21
Joined: Fri Jul 15, 2016 3:00 am

### What is Ka2?

I came across a question on one of the past midterms asking for a reaction that represents Ka2 for sulfurous acid (H2SO3). What exactly is Ka2?

Swati_Sharma_2D
Posts: 21
Joined: Wed Sep 21, 2016 2:59 pm

### Re: What is Ka2?

Hi,

Polyprotic acids (acids that have more than one proton to donate) will have Ka2 values. The Ka2 value describes the constant that you should use when the polyprotic acid is losing its second proton (H+).