H2O as a Gas
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H2O as a Gas
When producing an ICE table, what is done about H2O? Do we still exclude it even if it is a gas? (I'd think not, right?)
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Re: H2O as a Gas
If H2O is a gas, we include it in the ice table. If it is a liquid, we do not include it in the ice table.
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Re: H2O as a Gas
you only include gasses and aq things in the chemical equilibrium equation. That being said, water as a gas is included.
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Re: H2O as a Gas
Water is not included if it's in its liquid state because it is considered a solvent. If it is in its gaseous form, then it is included in calculations.
Re: H2O as a Gas
Within your ICE table, you should only include aq solutions and gases. If H2O is presented as a gas then you should still put it in the ICE table.
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Re: H2O as a Gas
if h2o is a gas, you include it in the ICE table. You only don't include substances that have a set amount of space they take up like a solid or a liquid.
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Re: H2O as a Gas
In the ICE table, gases and aqueous (which is dissolved in H2O) solutions are included, not solids or liquids. Therefore, H2O (almost always a gas or liquid) is included only if its not a liquid.
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Re: H2O as a Gas
We would only exclude it if it is in a solid or liquid form. However, if it is a gas, we would include it in the table.
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Re: H2O as a Gas
If H20 was a pure substance in the reaction (either a liquid or solid) it should not be included. But as a gas (water vapor), always include it in the ICE table.
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Re: H2O as a Gas
The main thing to remember here is whether the H2O is being used in the reaction or is just passive as a solvent. Most of the times when it is present as a gas, that is being formed as a product or is reacting as a reactant. When it is a liquid it is usually used as a solvent, so it is not involved in the reaction and is thus not used in the equilibrium calculations.
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Re: H2O as a Gas
Only when something is a solid or liquid will it not be included. For gaseous reactants/products, always include them!
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Re: H2O as a Gas
We do not use H2O if it is a liquid, but do use H2O if it is a gas in an equilibrium constant question
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Re: H2O as a Gas
H2O in the gas state would be included in the ICE table while it would not be included while it is in the liquid form because then it would be considered a solvent.
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Re: H2O as a Gas
because concentrations of liquids cannot change, liquid water is never considered for equilibrium. water's concentration as a gas can change so it would be considered and included in ICE table
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Re: H2O as a Gas
When water is considered a liquid (essentially the solvent in the equation), the concentration of liquids does not change significantly to say it has changed in cc. However, when water is considered a gas, it is variable and can change.
Re: H2O as a Gas
Always exclude solids/liquids. Water as a liquid should not be in the equation, but water as a gas should.
Re: H2O as a Gas
Normally, you would exclude it. But if it's a gas, you put it in the ICE Table. Anything that isn't a solid or liquid is included.
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Re: H2O as a Gas
H2O would still be included as a gas. When it's a liquid/solvent, then we wouldn't include it.
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Re: H2O as a Gas
Liquids and solids are not included because liquids tend to be in excess and remain virtually unchanged (and therefore cancel out in the numerator and denominator when calculating K) and solids don't have a concentration. Gases are included, and therefore H2O as a gas counts.
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Re: H2O as a Gas
If H2O is shown as a gas, you do not omit it from your ice table. It H2O is a liquid and is used as a solvent, you would not include it because it is in excess and the concentration of H2O does not change in the reaction.
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Re: H2O as a Gas
The basic rule is: excluding all solids and liquids (solvent). H2O can be a part of the equation as long as it is not solid or liquid.
Re: H2O as a Gas
We don't exclude H20 when it's a gas. We only exclude it when it's a liquid or solid.
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Re: H2O as a Gas
We do not exclude any gases. We will only exclude H2O when it is in liquid form. All liquids and solids are excluded because they do not have concentration. All gases and aqueous solutions will be included in the equilibrium constant/expression.
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Re: H2O as a Gas
Although we've typically seen it in its liquid form and do not use it, if H2O is present as a gas, then use it in the equilibrium calculation.
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Re: H2O as a Gas
Hi! The rule is that in general, gases are always included no matter which molecule, and liquids and solids should always be excluded no matter which molecule. Even though H2O may typically be seen in its liquid form, if its in a gas form it should be included.
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Re: H2O as a Gas
We don't include solids or liquids when solving ICE tables. When water is a gas, I believe we include it in the ICE table because the partial pressure of the gas will affect the overall equilibrium. Please correct me if I'm wrong!
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Re: H2O as a Gas
We would only include H20 in our I.C.E. table if H20 is labeled in the gaseous state in the reaction. As a reminder, liquids and solids are not included in the ICE table.
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Re: H2O as a Gas
Generally, you would include it if it was a gas and if it is NOT a solvent (meaning it is on both sides of the equation since (aq) means something + H2O).
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Re: H2O as a Gas
We would need to include H2O in the ICE table if it is a gas but would not be included if it's in a liquid state.
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Re: H2O as a Gas
We do not include any substance that is in a liquid or solid state. We only include gases and aqueous states, so in this case we would include H20 only if it was a gas.
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Re: H2O as a Gas
If H2O is acting a solvent, then they are not included in the ICE table since the concentration doesn't change from reactant to product. If H2O is in its gas phase, then it is included in the ICE table.
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Re: H2O as a Gas
As stated above, you'd include water if in its gaseous state (as ICE uses aqueous and gases), but not if it was presented as a liquid (ICE doesn't include solvents or solids).
Re: H2O as a Gas
I agree with the previous responses. As a gas, H2O is not a solvent and thus has a measurable concentration change, so it must be included in the ICE table.
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Re: H2O as a Gas
If water is in the gas phase, then you should include it. But if it is a liquid or solid, then you leave it out.
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Re: H2O as a Gas
Yeah, if H2O is a gas, then it's included in the ICE table and all other calculations. But if it is in any other state, then it is excluded.
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Re: H2O as a Gas
If H2O is a gas, it should be included in the ICE table. If it is a liquid, we don't include it.
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Re: H2O as a Gas
We only exclude solids and liquids. We usually exclude H2O because it is almost always the solvent, but since it is a gas it will be involved in the reaction and is, therefore, include in the k constant.
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Re: H2O as a Gas
You include H2O in the ice table only if it is a gas. If it is a liquid then we wouldn't include it.
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Re: H2O as a Gas
Since H2O would be in its gaseous form, we will include it in our reaction (since it's not in solid or liquid form, which we will not include).
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Re: H2O as a Gas
If it is a gas, then we include it. If it is in liquid form (as is in most chemical equations dealt with so far), then we exclude it.
Re: H2O as a Gas
Just as previous replies have stated you would only include H2O in the reaction is it were a gas, not a liquid since liquids are never included.
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Re: H2O as a Gas
Hello! It is crucial to remember that when you are completing your ICE box that you include only aqueous solutions and ages. Hence, if H2O is expressed to be. a gas, then you should include it in the ICE box, however, if it was not, you would not include it.
Re: H2O as a Gas
when forming the ICE table it's important to remember that we don't include anything in the solid and liquid form! we definitely include it when it's a gas or aqueous. So for H2O, we would include it if it was a gas!
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Re: H2O as a Gas
When water is the solvent, it's ignored. When it is involved in the reaction (ex. being in gas form), it is included in calculations.
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Re: H2O as a Gas
H20 as a liquid is excluded as in an aqueous environment there is a surplus of water in both reactants and products. As a gas, include it in ICE tables.
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Re: H2O as a Gas
It depends what phase it's in. If it's a liquid we ignore it, but if it's aqueous then we do count it.
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Re: H2O as a Gas
You would only include H2O if it is in a aqueous phase, not when it is in the liquid phase.
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