Equilibrium Constant

Acidity
Basicity
The Conjugate Seesaw

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Nikitha Pothireddy 3J
Posts: 14
Joined: Fri Sep 26, 2014 2:02 pm

Equilibrium Constant

Postby Nikitha Pothireddy 3J » Sat Dec 13, 2014 3:19 pm

How can the acidity constant and basicity constant be used to find the equilibrium constant? Is there a relationship between the two?

RuniTanna4H
Posts: 11
Joined: Fri Sep 26, 2014 2:02 pm

Re: Equilibrium Constant

Postby RuniTanna4H » Sat Dec 13, 2014 3:51 pm

Kb and Ka are related in the following way:

Kb = (Kw) / (Ka),

where Kw = 1.0 x 10-14.

Nikitha Pothireddy 3J
Posts: 14
Joined: Fri Sep 26, 2014 2:02 pm

Re: Equilibrium Constant

Postby Nikitha Pothireddy 3J » Sat Dec 13, 2014 3:54 pm

I was actually wondering if Kb and Ka had a relationship with Kc, I know the relationship with Kw.

Saul Pelayo-Brambila 3L
Posts: 4
Joined: Fri Sep 26, 2014 2:02 pm

Re: Equilibrium Constant

Postby Saul Pelayo-Brambila 3L » Sat Dec 13, 2014 3:59 pm

The acidity constant is the concentration of the products of the acid dissociation reaction over the reactants (this gives you your kA). The basicity constant is the concentration of the products of the base over the reactants (this gives you your Kb). The stronger an acid, the weaker its conjugate base. The stronger the base, the weaker its conjugate acid.
kA x kB = kW = 10^-14

Saul Pelayo-Brambila 3L
Posts: 4
Joined: Fri Sep 26, 2014 2:02 pm

Re: Equilibrium Constant

Postby Saul Pelayo-Brambila 3L » Sat Dec 13, 2014 4:06 pm

Oh sorry, I did not see the other post. Anyways, Kc and Keq are the same and Kw is just a specific type of Kc that has to do with the formation of ions and water I believe.

Nikitha Pothireddy 3J
Posts: 14
Joined: Fri Sep 26, 2014 2:02 pm

Re: Equilibrium Constant

Postby Nikitha Pothireddy 3J » Sat Dec 13, 2014 7:28 pm

No that's fine, thank you!

Rachel Lipman
Posts: 45
Joined: Fri Sep 25, 2015 3:00 am

Re: Equilibrium Constant

Postby Rachel Lipman » Sat Nov 21, 2015 2:35 pm

Is it then that Ka and Kb are inversely proportional?

Anne Cam 3A
Posts: 71
Joined: Fri Sep 25, 2015 3:00 am

Re: Equilibrium Constant

Postby Anne Cam 3A » Sun Nov 29, 2015 7:17 pm

Yes, because their product is the constant Kw.


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