Cutoff for determining when to assume "small enough"

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Richmund Tan 1L
Posts: 25
Joined: Fri Sep 25, 2015 3:00 am

Cutoff for determining when to assume "small enough"

Postby Richmund Tan 1L » Tue Nov 10, 2015 1:18 pm

Hi guys,

On Monday's lecture, the Professor discussed that when Kp is small enough, we can assume that the -x value is trivial, and thus, we can ignore it, letting us avoid the cubic equation. Does anyone know what the threshold value is for Kp to be considered "small enough"?

Thanks in advance!

Giovanna Park 3G
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Re: Cutoff for determining when to assume "small enough"

Postby Giovanna Park 3G » Tue Nov 10, 2015 3:37 pm

I believe he said to use approximation when the equilibrium constant is 10^-4 or smaller.

Rohan Singhal 2D
Posts: 25
Joined: Fri Sep 25, 2015 3:00 am

Re: Cutoff for determining when to assume "small enough"

Postby Rohan Singhal 2D » Wed Nov 11, 2015 9:54 pm

If I remember correctly, Professor Lavelle said we will never be asked to solve cubic equations, meaning that the x-value will always be negligible


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