(aq) in calculating K

Moderators: Chem_Mod, Chem_Admin

Claudeth Martinez 1D
Posts: 52
Joined: Fri Sep 28, 2018 12:18 am

(aq) in calculating K

Postby Claudeth Martinez 1D » Sat Jan 12, 2019 7:46 pm

Does anyone know what we do when there is an (aq) in the chemical equation?

Arshiya
Posts: 69
Joined: Fri Sep 28, 2018 12:16 am
Been upvoted: 1 time

Re: (aq) in calculating K

Postby Arshiya » Sat Jan 12, 2019 8:45 pm

These short notations in a chemical reaction represent the form or state of the compound in the equation. "Aq" stands for aqueous solution, "s" represents a solid, "g" represents a gas state, and "l" represents a pure liquid form. When you see a compound with (aq) after it, remember to include it in the chemical equilibrium equation. Also, recall solids and liquids are not apart of the chemical equilibrium equation.

Esther Lee 4H
Posts: 67
Joined: Fri Sep 28, 2018 12:29 am

Re: (aq) in calculating K

Postby Esther Lee 4H » Sun Jan 13, 2019 12:14 pm

you still include it in the K and Q calculations. only solids and liquids are omitted from the calculations

chris_tsai_4H
Posts: 52
Joined: Fri Sep 28, 2018 12:26 am

Re: (aq) in calculating K

Postby chris_tsai_4H » Sun Jan 13, 2019 12:57 pm

Aqueous and gaseous products and reactants are included in the equilibrium constant but solids and liquids are excluded.

Nicole Garrido 2I
Posts: 52
Joined: Fri Sep 28, 2018 12:18 am

Re: (aq) in calculating K

Postby Nicole Garrido 2I » Sun Jan 13, 2019 1:25 pm

Aqueous and gases are included in the equilibrium constant and solids and liquids are not because molar concentrations of a pure substance, solids and liquids, does not change in a reaction.

Arta Kasaeian 2C
Posts: 30
Joined: Mon Jan 07, 2019 8:22 am

Re: (aq) in calculating K

Postby Arta Kasaeian 2C » Sun Jan 13, 2019 1:31 pm

Generally when (aq) is posted we are bound to calculate the Equilibrium Constant (Kc) using the concentration of the compounds. Beware that when (aq) is used, there may be a solvent especially water (H2O) in which point we don’t consider its concentration in our formula because its mass is too big and it cancels out in the products and reactants.

anthony_trieu2L
Posts: 60
Joined: Fri Sep 28, 2018 12:29 am

Re: (aq) in calculating K

Postby anthony_trieu2L » Sun Jan 13, 2019 1:38 pm

When calculating K, we do not consider pure liquids and solids because we are only interested in things that are changing. Pure solids remain constant and liquids like water are too excessive to consider.

Yiting_Gong_4L
Posts: 69
Joined: Fri Sep 28, 2018 12:25 am

Re: (aq) in calculating K

Postby Yiting_Gong_4L » Mon Jan 14, 2019 12:08 am

The aqueous solution is still included in the calculation for K. Only solids and liquids are ignored.

Jake Gordon 1A
Posts: 61
Joined: Fri Sep 28, 2018 12:15 am

Re: (aq) in calculating K

Postby Jake Gordon 1A » Mon Jan 14, 2019 8:05 pm

Aq means that the substance is dissolved in water, this can still be used for Kc and Qc but since it is aqueous it can not be used in Kp or Qp

Just a reminder that Liquids (pure water) and solids are omitted from all K and Q calculations

Amy Dinh 1A
Posts: 62
Joined: Fri Sep 28, 2018 12:23 am

Re: (aq) in calculating K

Postby Amy Dinh 1A » Mon Jan 14, 2019 8:07 pm

Aqueous means that the substance is dissolved in water. It is counted when calculating concentrations and the equilibrium constant Kc.


Return to “Equilibrium Constants & Calculating Concentrations”

Who is online

Users browsing this forum: No registered users and 1 guest