How to find if you -x or +x for ICE

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KarenaKaing_1D
Posts: 37
Joined: Fri Sep 25, 2015 3:00 am

How to find if you -x or +x for ICE

Postby KarenaKaing_1D » Wed Nov 18, 2015 5:29 pm

How do you know if you -x or +x for a problem that requires the ICE table? For instance, what if the problem does not have enough information to see if you can compare Q to K.

Tiffany Chen 2E
Posts: 26
Joined: Fri Sep 25, 2015 3:00 am

Re: How to find if you -x or +x for ICE

Postby Tiffany Chen 2E » Wed Nov 18, 2015 8:15 pm

One way would be if you are given the K value. If K is a large value or K>1 you can assume that the reaction favors the products since the products constitute the numerator in the K expression (a larger numerator compared to the denominator would mean a larger K value), and thus the reactants would be -x and the products +x in your ICE table. Vice versa, if K is a small value or K<1 the reaction favors the reactants and your reactants will be +x while the products are -x.


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