## Kc, Kw, and pKw

Sophia_Kiessling_2L
Posts: 61
Joined: Fri Sep 28, 2018 12:26 am

### Kc, Kw, and pKw

What do Kc, Kw, and pKw stand for exactly?

Amy Dinh 1A
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

### Re: Kc, Kw, and pKw

Kc is the equilibrium constant, which is measured using products and reactants in either the gaseous or aqueous state.
Kw is the autoprolysis constant of water at 25 degrees Celsius and is always equal to 1.0 x 10^-14.
pKw is the -log(Kw) as p is shorthand for -log.

Ronald Thompson 1F
Posts: 59
Joined: Fri Sep 28, 2018 12:25 am

### Re: Kc, Kw, and pKw

These will be important to memorize, as they do not show up on the constants and equations sheet.

Becky Belisle 1A
Posts: 81
Joined: Fri Sep 28, 2018 12:18 am

### Re: Kc, Kw, and pKw

Kw = [H3O+][OH-]

A De Castro 14B 2H
Posts: 75
Joined: Fri Sep 28, 2018 12:29 am

### Re: Kc, Kw, and pKw

Kc is a reaction's equilibrium constant. $Kc = \frac{[prodcuts]}{[reactants]}$
Kw is the ionization constant of water. Kw = [H3O+][OH-] = 1.0 x 10-14
pKw is just the negative log of water's ionization constant. pKw = -log(pKw)