ICE charts

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Danielle Fabian 1H
Posts: 10
Joined: Fri Sep 25, 2015 3:00 am

ICE charts

Postby Danielle Fabian 1H » Tue Dec 01, 2015 9:38 pm

When we are trying to find the change in concentration, how do we know whether to add or subtract x?

004636950
Posts: 29
Joined: Fri Sep 25, 2015 3:00 am

Re: ICE charts

Postby 004636950 » Tue Dec 01, 2015 10:37 pm

In an ICE chart, you normally add x to the products and subtract x from the reactants.

Robert Valencia 3K
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Re: ICE charts

Postby Robert Valencia 3K » Wed Dec 02, 2015 1:15 am

When you change the concentration of something (let's say i reduce the amount of product), the reaction shifts to the right, causing a decrease (-x) of reactants and a (+x) in products. The same can be said for the other way around. It all depends on how the reaction changes.

Christian Hessenauer 2A
Posts: 21
Joined: Fri Sep 25, 2015 3:00 am

Re: ICE charts

Postby Christian Hessenauer 2A » Wed Dec 02, 2015 11:38 am

To add to the above answer....

If reaction favors products then the equilibrium will shift to the right (towards the products). You will then subtract x from the reactant side and add x on the product side.

If reaction favors the reactants then the equilibrium will shift to the left (towards the reactants). You will then subtract x from the product side and add x to the reactant side.

And like Robert said early, it all depends on how the reaction changes to figure out what whether to add or subtract x from the product or reactant side.

Alondra Loera 1A
Posts: 20
Joined: Fri Sep 25, 2015 3:00 am

Re: ICE charts

Postby Alondra Loera 1A » Fri Dec 04, 2015 12:14 am

So this is kind of an overview when filling out an ICE chart with X ...
Note that the equation will shift in only one direction. Then indicate an amount, x, that it shifts and write the stoichiometric coefficient in front of x and put a minus sign in front of any species for which the concentration decreases and use a plus sign in front of x of any species for which the concentration increases.


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