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ice table mols/molarity

Posted: Sun Jan 20, 2019 8:38 pm
by Alyssa Bryan 3F
In 5I.23 7th edition, the problem states that "a reaction mixture consisting of 2.00 mol CO and 3.00 mol H2 is placed in a reaction vessel of volume 10.0 L and heated at 1200 K. At equilibrium, 0.478 mol Ch4 was present in the system. Determine the value of Kc for the reaction CO(g) + 3H2(g) = Ch4(g) + H20(g) at 1200k."

Is is better to use mols in the ice chart and calculate the molarities after or to first calculate all the molarities and plug those into the ice chart?

Re: ice table mols/molarity

Posted: Sun Jan 20, 2019 9:52 pm
by Samantha Pacheco 2K
I believe it is best to calculate the molarities before, this will make it easier when trying to solve for your unknown value.

Re: ice table mols/molarity

Posted: Sun Jan 20, 2019 11:41 pm
by Michelle Nwufo 2G
It does not matter, as you will get the same answer either way. However, I am confused on how to determine which reaction will be favored when calculating the positive and negative changes in molarity when constructing the ICE table. Does anyone happen to know?

Re: ice table mols/molarity

Posted: Sun Jan 20, 2019 11:53 pm
by 505211599
Solving for molarity beforehand will allow you to find the unknown values as opposed to finding moles.