Ka Kb = Kw

JeremyPark14B
Posts: 29
Joined: Fri Sep 28, 2018 12:19 am

Ka Kb = Kw

I know this isn't exactly equilibrium, but I wasn't sure where to ask it. For the final, in what context are we going to need to know and apply the Ka x Kb = Kw?

keyaluo4C
Posts: 54
Joined: Fri Sep 28, 2018 12:17 am

Re: Ka Kb = Kw

I can't be sure what will appear on the final but we used Kw on the first test. A basic reaction and the pKa was given so you had to use Kb= Kw/Ka to find the Kb to solve the problem.

Phan Tran 1K
Posts: 29
Joined: Fri Sep 28, 2018 12:19 am

Re: Ka Kb = Kw

The Ka/Kb can also help you find the concentrations of H+ of OH- ions depending on whether the reaction is acidic or basic, which can then help you find pH.

Lydia Luong 4L
Posts: 59
Joined: Fri Sep 28, 2018 12:24 am

Re: Ka Kb = Kw

You can use it to find the pH of a solution.

Heidi Ibarra Castillo 1D
Posts: 60
Joined: Fri Sep 28, 2018 12:19 am

Re: Ka Kb = Kw

you can use it to find the pH or the pOh

lukezhang2C
Posts: 59
Joined: Fri Sep 28, 2018 12:18 am

Re: Ka Kb = Kw

Kw is typically used to find Ka or Kb when given the other. The relation can be used in any number of ways depending on the problem and what you need to find.