Kc, Kw, and pKw

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

Kc, Kw, and pKw

Postby Sophia_Kiessling_2L » Mon Jan 14, 2019 8:07 pm

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

Postby Amy Dinh 1A » Mon Jan 14, 2019 8:11 pm

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

Postby Ronald Thompson 1F » Mon Jan 14, 2019 9:16 pm

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

Postby Becky Belisle 1A » Mon Jan 14, 2019 10:00 pm

Kw = [H3O+][OH-]

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

Re: Kc, Kw, and pKw

Postby A De Castro 14B 2H » Tue Jan 15, 2019 3:04 pm

Kc is a reaction's equilibrium constant.
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)


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