H2O

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Sophia Dinh 1D
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H2O

Postby Sophia Dinh 1D » Sun Mar 15, 2020 7:45 am

When do we include H2O and when do we exclude it from the ice table

Jorja De Jesus 2C
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Re: H2O

Postby Jorja De Jesus 2C » Sun Mar 15, 2020 7:48 am

You don't include H2O if it is in solid or liquid form. Solids and liquids are not counted in ICE tables.

Sydney Pell 2E
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Re: H2O

Postby Sydney Pell 2E » Sun Mar 15, 2020 2:01 pm

Solids and liquids are not factored into the calculations for equilibrium constants (and therefore in ICE tables) because their concentrations are not changing.

Alice Ma 2K
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Re: H2O

Postby Alice Ma 2K » Sun Mar 15, 2020 10:34 pm

If H2O is in the gaseous form, it should be included. But if it's in the liquid or solid form, then it doesn't need to be included.

Jacob Villar 2C
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Re: H2O

Postby Jacob Villar 2C » Sun Mar 15, 2020 10:48 pm

H2O is usually in liquid form, and liquids and solids are not included in ICE tables.

SVajragiri_1C
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Re: H2O

Postby SVajragiri_1C » Sun Mar 15, 2020 10:49 pm

You don't include any reactant or product in the liquid of solid form when writing out the equation, including H2O.

EllieSchmidtke_4I
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Re: H2O

Postby EllieSchmidtke_4I » Sun Mar 15, 2020 11:15 pm

H2O should only be included if its in gaseous {H2O(g)} form.

Emily Lo 1J
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Re: H2O

Postby Emily Lo 1J » Mon Mar 16, 2020 2:22 pm

You don't include water into your ice table because it's a liquid and when writing the equilibrium constants out, you disregard the liquids.

Ellen Amico 2L
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Re: H2O

Postby Ellen Amico 2L » Mon Mar 16, 2020 2:29 pm

You never include solids or liquids in the ICE table or equilibrium constants. If it's gaseous or aqueous, then it's included. In the case of H2O, the only time you would include it is if it's H2O(g).

Madeline Ogden 3B
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Re: H2O

Postby Madeline Ogden 3B » Mon Jan 04, 2021 3:22 pm

H2O should only be included in an ICE table if it's in gaseous form. We also disregard liquids and solids when making ICE tables due to the fact that there concentrations do not change.

Sam_Marasigan_3D
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Re: H2O

Postby Sam_Marasigan_3D » Mon Jan 04, 2021 3:32 pm

I believe that we omit H2O in the ICE table due to its liquid state. The concentration does not change.

Margaret Wang 2D
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Re: H2O

Postby Margaret Wang 2D » Mon Jan 04, 2021 3:35 pm

If it's in the liquid state it is considered a solvent/pure liquid, so no. However, if it is a gas (g) then it needs to be included.

Jack_Pearce_2H
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Re: H2O

Postby Jack_Pearce_2H » Mon Jan 04, 2021 4:06 pm

H20 can be omitted from the ice stable but if it is in gaseous form it typically needs to be included

Karl Yost 1L
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Re: H2O

Postby Karl Yost 1L » Mon Jan 04, 2021 10:00 pm

Water is omitted from Kc expressions when it is a solvent (i.e. exists as a liquid), as it does not change concentrations. If it exists in gaseous form, include it in the ICE table, in Kc expressions etc.

DMaya_2G
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Re: H2O

Postby DMaya_2G » Tue Jan 05, 2021 6:24 pm

Only include H2O when it is in gas form, but not when it is in solid or liquid form.

apurva-3E
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Re: H2O

Postby apurva-3E » Tue Jan 05, 2021 7:09 pm

Exclude it when it's a solid or liquid.

derickngo3d
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Re: H2O

Postby derickngo3d » Tue Jan 05, 2021 7:22 pm

Pure substances and solvents are not included in ICE tables.

Hope this helps!

Kimiya Aframian IB
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Re: H2O

Postby Kimiya Aframian IB » Tue Jan 05, 2021 7:35 pm

Sophia Dinh 1D wrote:When do we include H2O and when do we exclude it from the ice table

Hi! H20 is only included in the ICE table and K calculations when it is in the gas or aqueous form. This rule also applies for other reagents. Hope this helps!

Sarah_Hoffman_2H
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Re: H2O

Postby Sarah_Hoffman_2H » Tue Jan 05, 2021 7:37 pm

Like others have stated, basically H2O is only included if it is in the gas phase.

RyanKopeikin_2I
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Joined: Fri Aug 30, 2019 12:17 am

Re: H2O

Postby RyanKopeikin_2I » Tue Jan 05, 2021 8:54 pm

Water would not be included in the equilibrium constant (K) if it is in solid or liquid form. Liquids (solvents) and solids are so abundant in a chemical reaction that their molar concentrations do not change significantly during the reaction. Hopefully this reasoning helps a bit :)

Adrienne Yuh 2B
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Re: H2O

Postby Adrienne Yuh 2B » Tue Jan 05, 2021 9:55 pm

Solids and liquids in general aren't included in equilibrium.

Joshua Swift
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Joined: Wed Sep 30, 2020 9:50 pm

Re: H2O

Postby Joshua Swift » Wed Jan 06, 2021 9:57 pm

There is no need to have the H2O because you don't include any solids or liquids.

Morgan Gee 3B
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Re: H2O

Postby Morgan Gee 3B » Wed Jan 06, 2021 10:38 pm

Depending on the state/phase of water, we either include or don't include it in the equilibrium constant or reaction quotient. If it is considered a liquid or solid, we would not consider it, similar to other liquids and solids. However, if it is gaseous, we would include it. It would not be aqueous as aqueous is defined as being dissolved in water, and water dissolved in water would just be liquid water.

Alexandra Salata 2L
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Re: H2O

Postby Alexandra Salata 2L » Thu Jan 07, 2021 8:44 pm

Like other compounds and elements, you do not include water if it is in solid or liquid phase in your expression. Only when H20 is in the gas phase will you be able to include it.

Andersen Chu 2H
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Re: H2O

Postby Andersen Chu 2H » Thu Jan 07, 2021 11:53 pm

Usually H20 is the solvent and since there is so much of it and so little of it is reacting, the concentration is basically the same so you can just leave it out of the equation

Joel Meza 3I
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Re: H2O

Postby Joel Meza 3I » Sun Jan 10, 2021 12:02 pm

Solids and liquids are omitted, so only H2O as a gas should be included.

Kat Stahl 2K
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Re: H2O

Postby Kat Stahl 2K » Sun Jan 10, 2021 12:30 pm

When H20 is in solid or liquid form so ice or water it will not be included, only the gas will be included in ICE

Brandon Gruender 3F
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Re: H2O

Postby Brandon Gruender 3F » Sun Jan 10, 2021 1:16 pm

The only time that this is included in the table is when it is in gas (g) form. The compound is not included if it is in liquid or solid phases.

Jerry_T
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Re: H2O

Postby Jerry_T » Sun Jan 10, 2021 2:26 pm

You would only include H2O when it is in a gaseous phase.

Brian Nguyen 2I
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Joined: Wed Sep 30, 2020 9:49 pm

Re: H2O

Postby Brian Nguyen 2I » Sun Jan 10, 2021 10:06 pm

H2O is not included because solids and liquids are not included in equilibrium equations. The only exception would be if H2O was a gas.

DominicMalilay 1F
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Joined: Wed Sep 30, 2020 9:36 pm

Re: H2O

Postby DominicMalilay 1F » Sun Jan 10, 2021 10:15 pm

Only include it for gases because solids and liquids are not a part of the ice table!

Ke Huang 2G
Posts: 74
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Re: H2O

Postby Ke Huang 2G » Sun Jan 10, 2021 10:17 pm

We only include it when they are gases, not solids or liquids

Bai Rong Lin 2K
Posts: 91
Joined: Wed Sep 30, 2020 9:54 pm

Re: H2O

Postby Bai Rong Lin 2K » Sun Jan 10, 2021 10:36 pm

You do not include it when its solid or liquid, only include when it is gas.

Justin Zhang_1A
Posts: 91
Joined: Wed Sep 30, 2020 9:48 pm

Re: H2O

Postby Justin Zhang_1A » Sun Jan 10, 2021 10:45 pm

You only need to include H2O if it as a gas, but you can omit it when it is in a solid or liquid state.

Mina Tadros 3L
Posts: 93
Joined: Wed Sep 30, 2020 9:38 pm

Re: H2O

Postby Mina Tadros 3L » Sun Jan 10, 2021 10:46 pm

You only include H2O in the equilibrium constant if it is a gas. If it is a solid or a liquid, you do not include it.

LeahSWM 2E
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Joined: Wed Sep 30, 2020 9:47 pm

Re: H2O

Postby LeahSWM 2E » Sun Jan 10, 2021 10:52 pm

H2O is only included when it is in a gaseous phase!

Jared Limqueco 3E
Posts: 90
Joined: Wed Sep 30, 2020 9:37 pm

Re: H2O

Postby Jared Limqueco 3E » Sun Jan 10, 2021 11:07 pm

Include it only when it's in a gaseous state.

Daniel Hernandez 1G
Posts: 89
Joined: Wed Sep 30, 2020 9:45 pm

Re: H2O

Postby Daniel Hernandez 1G » Sun Jan 10, 2021 11:08 pm

You wouldn't include H20 in the presence of a solid or liquid.

Jaclyn Schwartz 1I
Posts: 101
Joined: Wed Sep 30, 2020 9:45 pm

Re: H2O

Postby Jaclyn Schwartz 1I » Sun Jan 10, 2021 11:10 pm

H20 is only included if it is in gaseous form. Other wise, in liquid or solid, it isn't needed to be included.

John Calonia 1D
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Joined: Wed Sep 30, 2020 9:49 pm

Re: H2O

Postby John Calonia 1D » Mon Jan 11, 2021 12:24 pm

In acid and base reactions where it is reacting with water, the water is in such excess that it is considered pure so it is not included in the calculations for chemical equilibrium constants.

Minh-Thy Vo 3D
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Re: H2O

Postby Minh-Thy Vo 3D » Mon Jan 11, 2021 12:52 pm

H2O is only included when it's denoted as a gas. If it's a solid or liquid, it won't be included.

Gabriel Nitro 1E
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Re: H2O

Postby Gabriel Nitro 1E » Mon Jan 11, 2021 1:20 pm

Hi,

We would only include H2O in the gaseous phase, as in the equilibrium constant.

We would not include H2O in the solid or liquid phase as they are pure substances.

Hope this helps! :)

Libby Dillon - 1A
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Re: H2O

Postby Libby Dillon - 1A » Mon Jan 11, 2021 1:53 pm

H20 is unique in that it sometimes plays a role in equilibrium concentrations and other times it does not. When H20 is in a gaseous state, include it in calculations. When H20 is in liquid form, omit it from any concentration equations. This is because liquids do not technically have a concentration and therefore are not included when finding K.

DMaya_2G
Posts: 105
Joined: Wed Sep 30, 2020 9:58 pm

Re: H2O

Postby DMaya_2G » Mon Jan 11, 2021 5:44 pm

H2O is only considered when it is a gas, and not a solid or a liquid.

Ariel Guan 1H
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Re: H2O

Postby Ariel Guan 1H » Mon Jan 11, 2021 6:40 pm

If H2O is a liquid or solid, you wouldn't include it. Only include H2O if it is in its gaseous form


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