## Using Ka or Kb to find pKa or pKb

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

ashwathinair
Posts: 113
Joined: Sat Aug 17, 2019 12:17 am

### Using Ka or Kb to find pKa or pKb

We have the formulas to find pKa and pKb, but if we are given an acid or base without the Ka or Kb how do we find the pKa or pKb? Or do we need to be given the Ka or Kb to find this?

Julie_Reyes1B
Posts: 105
Joined: Sat Jul 20, 2019 12:16 am

### Re: Using Ka or Kb to find pKa or pKb

I don't think we would have to calculate KA or KB without being given pKA or pKB because that requires ICE calculations (which we will learn in 14B). However, if you are given KA and asked to find KB or vice versa, you can do that with the equation KW=10-14=KAKB

Anna Heckler 2C
Posts: 102
Joined: Wed Sep 18, 2019 12:18 am

### Re: Using Ka or Kb to find pKa or pKb

We will be given the ionization constants (Ka and Kb) if needed