solids and K


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Jasmine W 1K
Posts: 49
Joined: Sat Sep 07, 2019 12:18 am

solids and K

Postby Jasmine W 1K » Thu Jan 23, 2020 12:33 pm

I am confused about why we don't include the solids when calculating K because they are included within the reaction.

Shivam Rana 1D
Posts: 106
Joined: Fri Aug 09, 2019 12:16 am

Re: solids and K

Postby Shivam Rana 1D » Thu Jan 23, 2020 12:36 pm

Solids are not in solution because they are not dissolved, and thus there exists no concentration for solids. solids function as a pure substance

ShastaB4C
Posts: 100
Joined: Thu Sep 26, 2019 12:18 am

Re: solids and K

Postby ShastaB4C » Thu Jan 23, 2020 12:37 pm

Solids don’t have concentrations or partial pressures, so it can’t be calculated in K.

Ying Yan 1F
Posts: 101
Joined: Fri Aug 02, 2019 12:16 am

Re: solids and K

Postby Ying Yan 1F » Thu Jan 23, 2020 12:39 pm

We don't included solids and pure liquids when solving for K because they don't have affect the concentration of the other reactants and products and does not exhibit a partial pressure. Hope that helps!

Pablo 1K
Posts: 118
Joined: Sat Feb 02, 2019 12:15 am

Re: solids and K

Postby Pablo 1K » Thu Jan 23, 2020 1:32 pm

There are no solids for concentration, that would the be pure substance.

Vincent Leong 2B
Posts: 207
Joined: Fri Aug 09, 2019 12:15 am

Re: solids and K

Postby Vincent Leong 2B » Thu Jan 23, 2020 2:21 pm

Their concentrations just don't differ when transitioning from the initial to equilibrium. In essence, if you were to include them into the K constant, it would essentially be 1 or negligible.

Angela Prince 1J
Posts: 102
Joined: Sat Aug 24, 2019 12:17 am

Re: solids and K

Postby Angela Prince 1J » Thu Jan 23, 2020 6:31 pm

solids do not have concentration or partial pressure.

Jaklin Astvatsatryan
Posts: 91
Joined: Wed Sep 18, 2019 12:18 am

Re: solids and K

Postby Jaklin Astvatsatryan » Thu Jan 23, 2020 6:44 pm

Basically, when you add a solid to a solvent, like water, it just sits at the bottom (it doesn't dissolve), therefore it has no concentration and doesn't affect the overall equilibrium constant.

Leila_4G
Posts: 114
Joined: Sat Sep 14, 2019 12:17 am

Re: solids and K

Postby Leila_4G » Thu Jan 23, 2020 7:28 pm

For not including liquids and solids, what if there is H2O as a gas? When I see that I'm worried that there is a typo.
Also, I've noticed a few typos in the textbook so far about figure numbers which is frustrating.


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