Assuming x is negligible

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Cynthia Tsang
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Joined: Fri Sep 29, 2017 7:07 am
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Assuming x is negligible

Postby Cynthia Tsang » Mon Nov 27, 2017 9:41 pm

When can you assume that, in your ICE table, x is negligible and can be removed from your equilibrium constant equation?

Naveed Zaman 1C
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Joined: Fri Sep 29, 2017 7:04 am
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Re: Assuming x is negligible

Postby Naveed Zaman 1C » Mon Nov 27, 2017 9:46 pm

There are certain conditions where K is a specific value that can allow you to ignore "x" because it is small, but I don't think Dr. Lavelle has taught us this and won't expect us to know it for testing purposes.

MorganYun1H
Posts: 59
Joined: Thu Jul 13, 2017 3:00 am

Re: Assuming x is negligible

Postby MorganYun1H » Mon Nov 27, 2017 9:48 pm

I think he addressed this question on one of the modules. If K is less than 10^-3, that's when you can assume x is negligible.

Lianna Kishi 1A
Posts: 23
Joined: Thu Jul 27, 2017 3:00 am

Re: Assuming x is negligible

Postby Lianna Kishi 1A » Mon Nov 27, 2017 9:50 pm

I was wondering this too but I know for homework problem 11.51 x is negligible for the reactants because their equilibrium concentration (when calculated with proper sigfigs) rounds off to be the same as their initial concentration.


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