Pure substances

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Katherine Grillo 1B
Posts: 69
Joined: Fri Sep 28, 2018 12:28 am

Pure substances

Postby Katherine Grillo 1B » Mon Jan 21, 2019 10:43 am

Why aren't solids and liquids included in K expression? Wouldn't it significantly change K?

Steven Garcia 1H
Posts: 79
Joined: Fri Sep 28, 2018 12:16 am

Re: Pure substances

Postby Steven Garcia 1H » Mon Jan 21, 2019 11:06 am

I believe it's because the availability of solids and liquids remains constant whereas the gases don't. The solids and liquids aren't as affected by volume like gases are.

George Ghaly 2L
Posts: 66
Joined: Fri Sep 28, 2018 12:29 am
Been upvoted: 1 time

Re: Pure substances

Postby George Ghaly 2L » Mon Jan 21, 2019 2:49 pm

While at equilibrium only aqueous and liquid species are represented in the equilibrium expression as they are the only species can change the concentrations.

Carlos De La Torre 2L
Posts: 60
Joined: Tue Oct 09, 2018 12:16 am

Re: Pure substances

Postby Carlos De La Torre 2L » Mon Jan 21, 2019 3:29 pm

This is because solids don't change in concentration because they don't have a concentration and liquids don't change because it is usually in excess and would cancel out on both sides.


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