### Using variables in ICE tables

Posted:

**Sun Jan 13, 2019 11:21 am**Can someone explain when you should use variables such as X in an ICE table versus finding the change based on stoichiometric coefficients before being plugged into the table?

In one of the Audio-Visual Learning Modules (I think equilibrium part 2) Dr.Lavelle went ahead and used mole ratios to find the change of each product and each reactant before using the table. I understand that using the variables in the table is essentially using the mole ratios but just without actual values at first but, still, when should we use each approach?

In one of the Audio-Visual Learning Modules (I think equilibrium part 2) Dr.Lavelle went ahead and used mole ratios to find the change of each product and each reactant before using the table. I understand that using the variables in the table is essentially using the mole ratios but just without actual values at first but, still, when should we use each approach?