Calculating Equilibrium Constants
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Calculating Equilibrium Constants
In the ICE charts, how are the number of x's determined for each different molecule when calculating the Change in Molarity? Is it determined by the number of moles of the substance in the given equation? I am confused.
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- Posts: 95
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Re: Calculating Equilibrium Constants
Hello,
For the ICE table the amount that changes to reach equilibrium is denoted by x for both the products and reactants. If the sample problem was 2A + 3B ----> 3C and we were given the initial concentrations for A and B at both 0.1, then we would do 0.1-2x for A and 0.1-3x for B. For C it's initial would be 0 and it would follow with a +3x. Hope this helped!
For the ICE table the amount that changes to reach equilibrium is denoted by x for both the products and reactants. If the sample problem was 2A + 3B ----> 3C and we were given the initial concentrations for A and B at both 0.1, then we would do 0.1-2x for A and 0.1-3x for B. For C it's initial would be 0 and it would follow with a +3x. Hope this helped!
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Re: Calculating Equilibrium Constants
Yes- in an ice table, the number of x's you put for the change is the same as the amount in the equation. For example, in the equation "N2 + 3H2 = 2NH3", you would subtract 1x from N2, 3x from H2, and add 2x to NH3. Logically, this makes sense because in a reaction, 1 molecule of N2 will combine with 3 molecules of H2 and be lost in order to create 2 new NH3 molecules.
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