Water in K constant
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Water in K constant
Is water included in the K constant expression if it is a gas? Is it only not included when it is a solvent?
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Re: Water in K constant
Yes, water is included in the K constant if it is a gas because gasses can be written as a concentration and it is not the solvent. If it is a liquid it will not be in the K constant expression.
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Re: Water in K constant
water is not included in the K constant when it is a solvent because it is viewed as pure. Liquids and solids are not included in the K constant since their concentrations do not significantly change.
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Re: Water in K constant
kristi le 2F wrote:water is not included in the K constant when it is a solvent because it is viewed as pure. Liquids and solids are not included in the K constant since their concentrations do not significantly change.
To add to this, since water is the solvent, it will be in excess and so its concentration will not experience a significant change. This is why when water is in its liquid form, we don't include it in the K expression.
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Re: Water in K constant
If water is in its gas phase in the reaction, then you do include it in your equilibrium ratio.
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Re: Water in K constant
Water is only not included if it is a solvent (liquid) or a solid.
Last edited by Simon Dionson 4I on Thu Jan 23, 2020 1:16 pm, edited 1 time in total.
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