ICE Tables

[Nina Fukui 2J]

When filling the "C" row for ICE tables, the values of the X's etc are only determined by the stoichiometric coefficients? or does it have to do with the molarity?

[Kelly Tran 1J]

The change in equilibrium, denoted by the "C" row, is determined by the stoichiometric coefficients. Whether the change in x is a positive or negative value depends on whether the reactant or product is being used up. For example, if the reactant is being used up, then the change will be -x whereas the product will be +x.

[Lillian Ma 1I]

The amount of times x is added or subtracted solely depends on the coefficients so if the coefficient was 2, you would add/subtract 2x. The value of x may depend on the molarity because of how molarity is involved in the calculations that follow.

[Navdha Sharma 3J]

The C row or the change row is determined by the stoichiometric coefficients in the reaction equation.

For ex: H2 + Cl2 ---> 2HCl

In the forward reaction the change for H2 will be -x, for Cl2 will be -x, and HCl will be +2x(because of its coefficients).

[George Hernandez 3I]

The coefficients determine how many x's are added or subtracted on each cooresponding side of the chemical equation.

[Wil Chai 3D]

Like everyone else has said, even though x represents a change in molarity, it's based on the stoich coefficients. By definition, Molarity is moles/liters. The change in moles/liters of each species involved in the reaction will depend on stoich coefficients, since those give the mole ratios of each.

[Mahi Kabra 2F]

It's only determined by the stoichiometric coefficients!

[Violet Kwan 3H]

The "I" row refers to the concentration or molarity, and the "C" row only refers to the coefficients.

[Saumya Tawakley 1E]

Yes, the C row refers to change in molarity based on stoichiometric coefficients, while the I row deals with initial molarity and the E row is just the sum of I and C to find equilibrium molarities.

[MariaCassol1L]

When setting up ICE tables the changes in concentration will be dependent on the stoichiometric coefficient. This is because we want to keep the values balanced. Using an example:

N2 + 3H2 ----> 2NH3

You need 1mol of N2 to interact with 3mol of H2 and that forms 2 mol of NH3
and say you start with 4mol of N2. If there is a decrease of 2mol in N2 (so [N2]= 2mol at equi), you know that you need 6mol of H2 to react with those 2mol of N2, so [H2] will decrease by 6mol (because for every mol of N2 you use 3mol of H2). You also know that you will form 4mol of NH3 (because for every mol of N2 you create 2mol of NH3), so that [NH3] will increase by 4mol. So if the change in concentration is x then, for a change in x mols of [N2] you will have a change of 3x in [H2] and a change of 2x in [NH3]

[Justin Lin 1B]

We would determine the x value by the stoichiometric coefficient!

[Kyla Roche 2K]

For the reactants it is -x and for the products it is +x. The magnitude of x is determined by the stoichiometric coefficient.

[Brianna Martilla 1C]

It only has to do with the coefficients.

[Katie Phan 1K]

Just the coefficients!

[Sophia Spungin 2E]

Yes, I believe that the values of X correspond to the ratios between the stoichiometric coefficients, and you can decide the way in which to use these ratios.

[keely_bales_1f]

The values of x, or rather the quantity of it, does correspond to the stoichiometric coefficients of the balanced chemical equation.

[Brianna Chen 3F]

The stoichiometric coefficients determine the value of C in the ICE table.

[Ansh Patel 2I]

Hi! You're right, the C row is determined by stoichiometric coefficients.

[JaesalSoma1E]

The C row is for the change in equilibrium, which is denoted by x. Then, you would multiply x by the stoichiometric coefficient.

[Melissa Solis 1H]

The C row in the ICE table only use the stoichiometric coefficients :)

[Michael Cardenas 3B]

The C row is only for the change in equilibrium, which is represented by X, and this is multiplied by the stoichiometric coefficient.

[Crystal Pan 2G]

The x's are determined by the stoichiometric coefficients.

[Eve Gross-Sable 1B]

The numbers next to Xs are just the coefficients and do not have to do with the molarity. Molarity is the concentration, which you end up plugging in later.

[Shana Patel 1C]

X stands for the C row - the change in equilibrium. This figure will be multiplied by the stoichiometric coefficient. This is all found in the ICE table.

[Krish_Ajmani_3J]

The stochiometric coefficient tells you the coefficient in front of X in the "C" row of the ICE table. For example, if there are 2 moles of a substance in the balanced equation, the "C" row should indicate -2X or +2X (depending on the problem).

[Javier Perez M 1H]

It depends on what is given. Think of it as an equilibrium reaction where if the products are given instead of reactants you have to decrease products to get your reactants and then use reactants to possibly find the eq concentration of your product.
right everyone? or am I wrong?

[Will Skinner]

It is only be determined by stoichiometric coefficients because we are solving for the molarity values.

[David Liu 1E]

it's based off the coefficients!

[Liam Bertrand 3]

coefficients!

[Winzel Payumo 1B]

It's always the coefficient, hence why you need to make sure the equation provided is balanced! The molarity/pressure will only appear for the I and E rows :)

[Ziyan Peng 3A]

Coefficients! This is because x in and of itself represents some amount of molarity and in the C part of the ICE chart we are trying to quantify the amount of change. These changes should be proportional to the stoichiometry of the reaction, therefore the coefficients before x.

[Kat Stahl 2K]

Yes the x value is determined by the coefficient, just like everyone else has said!

[Sophia Spungin 2E]

I believe that it is only dictated by the stoichiometric coefficient. It is during the 'E' row that molarity is taken into account.

[Nan_Guan_1L]

In order to get the correct ICE table, both factors would matter since the coefficient of reactants and products determines the coefficient of x, and whether it’s used up or being produced determines the sign in front of x

[IshanModiDis2L]

Like mentioned above, the coefficients determine how much of an x value is added or subtracted on each side of the reaction. I would suggest to make sure the reaction is balanced however.

[Jeremy Wei 2C]

Hi! Like everyone else said, the x-values are determined by the coefficients.

[David Y]

It is dependent on the stoichiometric coefficients and whether the compound is a reactant or product for a negative or positive value of x.