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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
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."
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.
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