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Pure Solids and Liquids

Posted: Sun Jan 13, 2019 9:48 pm
by Sara Lakamsani 4D
I still don't quite understand why we discount pure solids and liquids. Can someone help explain?

Re: Pure Solids and Liquids

Posted: Sun Jan 13, 2019 10:07 pm
by Yvonne Du
My TA said they dont affect equilibrium

Re: Pure Solids and Liquids

Posted: Sun Jan 13, 2019 10:14 pm
by paytonm1H
My understanding is that because pure liquids remain extremely dilute and solids barely dissociate, their effects on equilibrium are disregarded. Therefore they are not included in the equilibrium constant.

Re: Pure Solids and Liquids

Posted: Sat Mar 16, 2019 10:05 pm
by Sara Lakamsani 4D
Thank you guys for your responses!

Re: Pure Solids and Liquids

Posted: Sat Mar 16, 2019 10:16 pm
by Maayan Epstein 14B
It is similar to how we do pseudo rate constants. We make one reactant so large that it basically doesn't affect the reaction rate, enabling us to just study the other reactant as if it is the only thing that affects the rate. Same thing with liquids and solids. They are in such high excess that they do not affect the rate, so you look to the other aquesous components because those are the limiting factors that affect equilibrium and rate.