K based on phases


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705279989
Posts: 20
Joined: Mon Jun 17, 2019 7:24 am

K based on phases

Postby 705279989 » Thu Jan 09, 2020 4:54 pm

Why can you only find the equilibrium constant for reactants and products in the same phase? For example, for K, why can't you include values of compounds in the gas phase and solid phase but just one or the other?

Maya Pakulski 1D
Posts: 83
Joined: Thu Jul 11, 2019 12:17 am

Re: K based on phases

Postby Maya Pakulski 1D » Thu Jan 09, 2020 5:05 pm

You will never include the concentrations of solids and liquids because, for example, when a solid is dissolved in water the concentration changes such a small amount that it is almost insignificant unlike with a gas where the concentration does change.

Giselle Littleton 1F
Posts: 58
Joined: Wed Sep 18, 2019 12:20 am

Re: K based on phases

Postby Giselle Littleton 1F » Thu Jan 09, 2020 5:06 pm

You can find the equilibrium constant for reactants and products if they are gas and/or aqueous.

805291863
Posts: 80
Joined: Sat Sep 14, 2019 12:16 am

Re: K based on phases

Postby 805291863 » Thu Jan 09, 2020 5:12 pm

When determining K, only reactants and products that are aqueous or a gas are considered.

Also, a reaction's considered values will either all be pressures or all be concentrations.

Jessica Kwek 4F
Posts: 24
Joined: Mon Jan 06, 2020 7:57 am

Re: K based on phases

Postby Jessica Kwek 4F » Thu Jan 09, 2020 5:13 pm

Pure solids and liquids are not considered when calculating the equilibrium constant.


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