ICE Tables
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Re: ICE Tables
Since the reaction begins with only reactants and moves towards equilibrium as products form, the amount of reactant decreases and the amount of product increases. So, you use +x for products and -x for reactants
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Re: ICE Tables
One way that you can help figure out if the reaction is proceeding forwards (-x from reactants) or backwards (-x from products) is to look at the the Keq (equilibrium constant) if it provides it in the question. If the Keq is < (1.0 x 10^3), then the reaction will proceed forward(-x from reactants, +x to products). If the Keq is larger than (1.0 x 10^3), then the reaction will proceed backwards(+x to reactants, -x from products).
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Re: ICE Tables
It depends on whether the reaction is going forward or reverse. This is found by comparing the reaction quotient (Q) and the chemical equilibrium (K).
Re: ICE Tables
Usually +x is used for products and -x is used for reactants, but it does depend if it is a forward or reverse reaction.
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Re: ICE Tables
This depends on each reaction, but if the reaction is moving in the forward direction, reactants in the ice table will have a change of -x and products in the ice table will have a change of +x.
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Re: ICE Tables
+ X is generally used for products and - X for reactants, as the former is produced from reaction and the latter is used up. However, I'm sure it depends on the context of the question.
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Re: ICE Tables
If you are only given intial concentrations of the reactant and products and the K value, then create an equilibrium ratio and solve for Q. If Q < K, then the reaction is moving in the forwrd direction, and the reactants will have -x while the product is +x. On the other hand, if Q > K, then the reaction is moving in the reverse direction and the reactants will be -x and products will be +x. *Note: MOST of the time, the reactants will be -x and the products will be +x. Hope that helps!
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