Kc favoring products

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Yun Su Choi 3G
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Kc favoring products

Postby Yun Su Choi 3G » Mon Jan 04, 2021 6:23 pm

In the example from the lecture today, Dr. Lavelle said that a Kc of 61.0 only slightly favors products even though Kc is greater than 1. Is this because K is not larger than 10^3 that it is hard to say it strongly favors products?

Akshata Kapadne 2K
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Re: Kc favoring products

Postby Akshata Kapadne 2K » Mon Jan 04, 2021 6:25 pm

Yes, exactly. Only when K is greater than 10^3 can you say that the reaction strongly favors products.

KatarinaReid_3H
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Re: Kc favoring products

Postby KatarinaReid_3H » Mon Jan 04, 2021 6:26 pm

You are correct. Any Kc larger than 10^3 or smaller than 10^-3 is said to strongly favor the products or reactants. Otherwise Kc is too close to one, which means it does not favor at all.

Emmeline Phu 1G
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Re: Kc favoring products

Postby Emmeline Phu 1G » Mon Jan 04, 2021 8:31 pm

Hi! Yes, you would be correct. The general rule to follow is that if Kc is larger than 10^3 then at equilibrium the reaction strongly favors the products and if Kc is smaller than 10^-3 the reaction strongly favors the reactants. However, when Kc is greater than one then it is generally considered to favor the products but not strongly. Hope this helps! :)

austin-3b
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Re: Kc favoring products

Postby austin-3b » Mon Jan 04, 2021 11:53 pm

You are correct; even though 61 seems like a big number, you can only conclude that it favors products when it's 10^3 and above and reactants when it's 10^-3 and below.

Eric Cruz 2G
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Re: Kc favoring products

Postby Eric Cruz 2G » Tue Jan 05, 2021 3:19 pm

Yes, as Lavelle said, the cut off is relative to the field you are in. When K>1, it generally favors the products (not necessarily strongly). However, once, it exceeds 10^3, for the sake of this class , this would signal that the products are strongly favored.

Katie Le 3K
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Re: Kc favoring products

Postby Katie Le 3K » Tue Jan 05, 2021 8:32 pm

Yes. It only slightly favors it. you cannot make a strong statement about the favor unless its greater than 10^3

Crystal Pan 2G
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Re: Kc favoring products

Postby Crystal Pan 2G » Tue Jan 05, 2021 10:09 pm

Yes, if the number is between 10^-3(or 10^-4 in some cases) and 10^3, they are not strongly favoring neither reactants or products.

Mary Gallo 1G
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Re: Kc favoring products

Postby Mary Gallo 1G » Tue Jan 05, 2021 10:14 pm

When K>1 then the chemical reaction will favor the products. However, K needs to be greater than 10^3 to strongly favor the products.

The reverse goes for K<1, where the chemical reaction favors the reactants. In this case, K needs to be less than 10^-3 to strongly favor the reactants.

apurva-3E
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Re: Kc favoring products

Postby apurva-3E » Tue Jan 05, 2021 11:36 pm

Exactly, when k > 10^3 it favors the products

Saumya Tawakley 1E
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Re: Kc favoring products

Postby Saumya Tawakley 1E » Tue Jan 05, 2021 11:39 pm

Whenever Kc is greater than 10^3, we can say it stronger favors products. With a Kc of 61.0, we know it favors products, but it only favors product formation slightly.


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