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Water in ICE tables

Posted: Sun Jan 20, 2019 8:04 pm
by 705170809
Why do we omit water in the ICE tables?

Re: Water in ICE tables

Posted: Sun Jan 20, 2019 8:07 pm
by megansardina2G
Water is a liquid, which is a pure substance (along with solids); you cannot increase or decrease its concentration. Therefore, liquids are omitted when dealing with equilibrium constants.

Re: Water in ICE tables

Posted: Sun Jan 20, 2019 8:10 pm
by 405021651
because it is a pure liquid!!!!

Re: Water in ICE tables

Posted: Sun Jan 20, 2019 8:15 pm
by Celeste 1I
It would be on both sides of the equation and would just cancel out in the equilibrium equation. So it doesn't effect K.

Re: Water in ICE tables

Posted: Sun Jan 20, 2019 9:30 pm
by Mercan Bayazit 4E
Because unlike the other molecules in the reactions we see, water is a pure liquid and we therefore omit it in the ICE tables.

Re: Water in ICE tables

Posted: Sun Jan 20, 2019 10:30 pm
by Alma Flores 1D
The concentration of a pure substance does not change in a reaction! Therefore solids and liquids are not included in K expression.

Re: Water in ICE tables

Posted: Sun Jan 20, 2019 10:36 pm
by Tony Ong 3K
Moreso on that, think of water, or any other forms of pure liquids, as solvents. Usually, solvents are larger in concentration than its solute constituents. Therefore, even during equilibrium the relative concentration of solvents remain the same.

Re: Water in ICE tables

Posted: Mon Jan 21, 2019 12:55 pm
by Mona El Masri 1F
Water is a pure substance and a solvent. The concentration won't change and it'll cancel out on both sides so theres no point in including it in an ice table or a Ka/Kb calculation.

Re: Water in ICE tables

Posted: Mon Jan 21, 2019 2:42 pm
by George Ghaly 2L
Since water is a pour solvent in can be left out of the ice table when calculating equilibrium concentrations since it is in excess.

Re: Water in ICE tables

Posted: Mon Jan 21, 2019 5:12 pm
by Rehan Chinoy 1K
Pure substances (solids, liquids) such as water do not affect the equilibrium expression.

Re: Water in ICE tables

Posted: Mon Jan 21, 2019 8:12 pm
by Yiting_Gong_4L
water is omitted because it is a liquid. solids and liquids do not affect the equilibrium.