ICE Box Ratios

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Vana Mirzakhani 3I
Posts: 62
Joined: Fri Sep 28, 2018 12:24 am

ICE Box Ratios

Postby Vana Mirzakhani 3I » Sat Jan 26, 2019 7:57 pm

May someone please explain the ratios for the ice boxes that we do? How does "-x" work with ratios? Thank you.

Aidan Ryan 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:17 am

Re: ICE Box Ratios

Postby Aidan Ryan 1B » Sat Jan 26, 2019 8:07 pm

What do you mean by ratios? As in Products/ Reactants? -x is how much product has been taken away.

harshitasarambale4I
Posts: 58
Joined: Fri Sep 28, 2018 12:26 am

Re: ICE Box Ratios

Postby harshitasarambale4I » Sat Jan 26, 2019 10:41 pm

-X is usually found in the "C" or the "change" row of the ICE table. It is not used when calculating K.

Christina Chang 1C
Posts: 34
Joined: Thu May 10, 2018 3:00 am

Re: ICE Box Ratios

Postby Christina Chang 1C » Sat Jan 26, 2019 10:55 pm

I'm not sure if this answers your question but if you mean ratios as in using the balanced equations then if the reaction is like A+B-->2C then on the products side of the ice table on the change line it would be -X and -X but for the products side it would be +2X. Hope that helped

hazelyang2E
Posts: 57
Joined: Fri Sep 28, 2018 12:23 am

Re: ICE Box Ratios

Postby hazelyang2E » Sun Jan 27, 2019 4:16 pm

For a majority of the ICE tables, "-x" will be located in the "C" or change row for the reactants, and "+x" will be located in the "C" row for the products. It is also important to remember to multiply "x" by the molar ration of that compound. For example, if 2 CO2 is one of your reactants, the change would be "-2x."

204929947
Posts: 76
Joined: Fri Apr 06, 2018 11:03 am

Re: ICE Box Ratios

Postby 204929947 » Sun Jan 27, 2019 8:24 pm

-x will always be on the reactant side, someone correct me if im wrong (:

John_Richey_4A
Posts: 69
Joined: Fri Sep 28, 2018 12:27 am

Re: ICE Box Ratios

Postby John_Richey_4A » Sun Jan 27, 2019 10:28 pm

-x is just what you subtract from the initial.

Arta Kasaeian 2C
Posts: 30
Joined: Mon Jan 07, 2019 8:22 am

Re: ICE Box Ratios

Postby Arta Kasaeian 2C » Sun Jan 27, 2019 10:38 pm

So the “x” usually comes to work when calculating the change the concentrations/pressures we don’t know the amounts of. The (-x) is applied to the reactants side, which means when you make the table i would draw a huge line between reactants and products and anything left of that line is negative.

404975170
Posts: 68
Joined: Thu Jul 27, 2017 3:00 am

Re: ICE Box Ratios

Postby 404975170 » Sun Jan 27, 2019 10:50 pm

basically think of it as x is negative for the reactants because these are being used up to form the positive products


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