Page 1 of 1

Calculating K

Posted: Sun Jan 12, 2020 6:12 pm
by Brandon Tao 1K
Why is water not accounted for in calculating for K?

Re: Calculating K

Posted: Sun Jan 12, 2020 6:13 pm
by sbeall_1C
K does not include pure liquids or solids, merely aqueous solutions and gases!

Re: Calculating K

Posted: Sun Jan 12, 2020 6:14 pm
by TarynD_1I
Water is not accounted for when calculating for K because it does not affect the equilibrium of the reaction. Pure solids and pure liquids usually do not affect K and are not included in its calculation expression.

Re: Calculating K

Posted: Sun Jan 12, 2020 10:02 pm
by Jeremy_Guiman2E
Pure liquids and solids don't affect the reactant amount as their concentrations stay the same.

Re: Calculating K

Posted: Sun Jan 12, 2020 10:06 pm
by ShastaB4C
Would there be any solvent in which we would include it in K calculations?

Re: Calculating K

Posted: Sun Jan 12, 2020 11:04 pm
by sarahartzell1A
Water is not accounted for because it is a pure liquid!

Re: Calculating K

Posted: Sun Jan 12, 2020 11:12 pm
by Rafsan Rana 1A
pure liquids and solids, which includes water, are disregarded for the equilibrium expression because they don't have an affect on reactant amount at equilibrium and they don't have a concentrations to be used to calculate k.

Re: Calculating K

Posted: Sun Jan 12, 2020 11:41 pm
by Bryan Chen 1H
water is a pure liquid and a solvent. while it "takes part" in the reaction, the change is so small its negligible

Re: Calculating K

Posted: Sun Jan 12, 2020 11:51 pm
by Vivianvelazquez_1J
When calculating K water is not accounted for because the molar concentration of pure substances (solids or liquids) does not change in the reaction. Therefore solid and liquids are not included in the K expression.

Re: Calculating K

Posted: Mon Jan 13, 2020 12:00 am
by Sofia Barker 2C
Water is not accounted for because it is considered a pure liquid. Pure liquids don't undergo a change in concentration during a reaction, so it is not necessary to calculate their equilibrium concentrations.