Page 1 of 1

### Solids when using ICE

Posted: Thu Nov 23, 2017 4:21 pm
When we calculate the equilibrium constant I know that we ignore solids and liquids. Do we also do this when using the ICE method? Thank you!

### Re: Solids when using ICE

Posted: Thu Nov 23, 2017 5:24 pm
I believe so since you don't have any concentration of solids in the first place.

### Re: Solids when using ICE

Posted: Mon Nov 27, 2017 2:40 pm
When using the ICE method, you ignore the concentrations for solids and pure liquids. But you use their stoichiometric coefficients to set up the equation.

### Re: Solids when using ICE

Posted: Mon Nov 27, 2017 3:06 pm
So the only things that you would use for the ICE table are aqueous and gases?

### Re: Solids when using ICE

Posted: Fri Dec 01, 2017 12:02 am
Yes. You only use the concentrations of aqueous and gases in the ICE method. Therefore, you ignore the concentrations of the solids and liquids.

### Re: Solids when using ICE

Posted: Fri Dec 01, 2017 5:03 pm
Why do you ignore the liquids?

### Re: Solids when using ICE

Posted: Fri Dec 01, 2017 5:10 pm
Liquids are not compressed by pressure, so it does not change the speed of the reaction. That is why it is not in the equilibrium constant equation.

### Re: Solids when using ICE

Posted: Fri Dec 01, 2017 9:12 pm
This is also why you don't include solids in ICE tables. Although they may be mentioned in a rxn, when determining Kc for a given rxn, the concentrations of non aqueous/gaseous compounds is completely irrelevant (as mentioned above). A good example of this is found at https://chem.libretexts.org/Core/Physic ... Ice_Tables where they walk you through the process and give you more in depth reasoning behind equilibrium calculations.

### Re: Solids when using ICE  [ENDORSED]

Posted: Sat Dec 02, 2017 9:46 am
We do not use solids and liquids in the ICE method.