## Finding K: liquids and aqueous

Abigail Menchaca_1H
Posts: 104
Joined: Sat Sep 07, 2019 12:19 am

### Finding K: liquids and aqueous

Why do we keep aqueous solutions in the concentration equations and not liquids?

Hussain Chharawalla 1G
Posts: 100
Joined: Sat Jul 20, 2019 12:15 am

### Re: Finding K: liquids and aqueous

Aqueous solutions have a defined concentration. For example 10 moles of salt in one liter of aqueous solution is 10M concentration. However, a liquid by itself cannot be measured in concentration. If you had just water, you would not be able to write it in terms of a concentration.

Emil Velasco 1H
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Joined: Wed Nov 21, 2018 12:19 am

### Re: Finding K: liquids and aqueous

While liquids do not have a defined concentration (molarity), aqueous solutions do.

005324438
Posts: 51
Joined: Sat Aug 24, 2019 12:16 am

### Re: Finding K: liquids and aqueous

Liquids are pure substances and therefor cannot have a concentration. To have a concentration there needs to be a solute in a solvent, 2 substances, liquids are only 1 substance.

Althea Zhao 1B
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Joined: Mon Jun 17, 2019 7:24 am

### Re: Finding K: liquids and aqueous

Liquids don't change, so they cancel out.

chari_maya 3B
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Joined: Sat Sep 07, 2019 12:18 am

### Re: Finding K: liquids and aqueous

Is this the same case for solids?

405268063
Posts: 102
Joined: Thu Jul 25, 2019 12:17 am

### Re: Finding K: liquids and aqueous

Yes, this is the same case for solids. Their concentrations do not change.

AGaeta_2C
Posts: 112
Joined: Wed Sep 18, 2019 12:21 am

### Re: Finding K: liquids and aqueous

To clarify,
solids are not included in the K expression because they don't necessarily have a "concentration," and liquids are not included because they consist of a pure substance?

Is this thinking correct?

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