Concentration Affecting K

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Concentration Affecting K

Postby 905085650 » Mon Jan 14, 2019 10:07 am

Does adding more concentration affect K? Why or why not? Thank you!!

Noah Fox 1E
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Re: Concentration Affecting K

Postby Noah Fox 1E » Mon Jan 14, 2019 10:22 am

Adding more concentration of reactants or products will not change Kc. This is because Kc focuses on the rates of the reaction rather than the equality of the concentrates. The reaction will naturally begin to move back to its state of equilibrium but with increased values on both sides.

Neil Hsu 2A
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Re: Concentration Affecting K

Postby Neil Hsu 2A » Mon Jan 14, 2019 10:23 am

Increasing concentration does not affect K since when you add more reactants or products, the reaction is no longer in equilibrium. Remember that K is the ratio of the concentration of products to the concentration of reactants. After adding either reactants or products, the ratio would be imbalanced and the reaction will work to restore that ratio.

Ahmed Mahmood 4D
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Re: Concentration Affecting K

Postby Ahmed Mahmood 4D » Mon Jan 14, 2019 11:06 am

No—K is based on the rate of the forward and reverse reactions, not the concentrations of the products and reactants. Changing concentration will simply cause an imbalance between products and reactants, but this imbalance will be undone as the reaction returns to equillibrium and the equillibrium ratio between products and reactants is restored.

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Re: Concentration Affecting K

Postby Chem_Mod » Mon Jan 14, 2019 1:33 pm

K is the standard we use to determine if a reaction is at equilibrium or determine what the concentrations should be at equilibrium. If we change the concentrations, we change Q and may cause the reaction to temporarily not be at equilibrium, but we do not change K.

Nina Do 4L
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Re: Concentration Affecting K

Postby Nina Do 4L » Mon Jan 14, 2019 8:24 pm

No, changing the concentration will not affect K over time. More specifically, at first it will try to balance out the concentrations and eventually and gradually, it will counteract the change and come back to equilibrium.

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Re: Concentration Affecting K

Postby chrisavalos-2L » Tue Jan 15, 2019 1:02 am

No, it doe not affect the equilibrium constant K, this is because the constant is not determined by the concentration of the reactants and products but rather the rate at which the reaction or the reverse reaction occurs.

Anna O 2C
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Re: Concentration Affecting K

Postby Anna O 2C » Tue Jan 15, 2019 12:36 pm

Kc will remain constant throughout the whole reaction as long as the temperature remains constant. When the concentrations change, the reaction will simply respond by producing more or less of either reactant or product to filter the introduced additives into the equilibrium. For example, if you add more concentration of reactant, the reaction will shift to create more product, stabilizing itself and keeping Kc constant.

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