eq constant


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ursulavictorino1K
Posts: 55
Joined: Sun Feb 17, 2019 12:15 am

eq constant

Postby ursulavictorino1K » Thu Jan 09, 2020 9:27 pm

Why do we ignore the terms that are solids when calculating the eq. constat? Why does it not have an effect on the concentration?

Ryan Yoon 1L
Posts: 55
Joined: Mon Jul 01, 2019 12:15 am

Re: eq constant

Postby Ryan Yoon 1L » Thu Jan 09, 2020 9:33 pm

We ignore the terms that are solids when calculating the equilibrium constant because solids do not have concentration. Since it does not have a concentration, it can not be implemented in solving for the Reaction Quotient, Q, or Equilibrium constant, K.

Janet Nguy 2C
Posts: 115
Joined: Sat Aug 24, 2019 12:17 am

Re: eq constant

Postby Janet Nguy 2C » Thu Jan 09, 2020 9:46 pm

My TA said that the activity of solids and liquids are essentially equal to 1, so when calculating the equilibrium constant solids and liquids do not matter because all the units are essentially dealing with the activity of a species.

haileyramsey-1c
Posts: 105
Joined: Thu Jul 25, 2019 12:18 am

Re: eq constant

Postby haileyramsey-1c » Thu Jan 09, 2020 9:47 pm

Solids and liquids are not included in the reaction quotient because at equilibrium they do not affect the reactant amount. Their activity in the reaction is 1.

205405339
Posts: 77
Joined: Thu Jul 11, 2019 12:16 am

Re: eq constant

Postby 205405339 » Thu Jan 09, 2020 10:17 pm

Essentially solids and liquids are in such great excess and it is impossible to come up with a value for their concentration hence why they are omitted


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