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### ICE Table

Posted: Sat Jan 12, 2019 12:56 pm
If given the initial concentration/pressure of the reactant(s), are the initial concentrations/pressures of the products always going to be 0 in the ICE table?

### Re: ICE Table

Posted: Sat Jan 12, 2019 1:07 pm
Basically, yes; whenever you set up the ICE table, you start by assuming that the reaction hasn't taken place yet. Therefore, there won't be any products formed yet, so their initial concentrations are 0.

### Re: ICE Table

Posted: Sat Jan 12, 2019 1:13 pm
I think it would be zero if the question starts off by mentioning that the amount of reactant that will be used in a chemical reaction to produce some product. Since the reaction is just being carried out, all you're starting with is the initial concentration of the reactant(s), so in the beginning, you will have 0 products and thus why you put zero initially.

### Re: ICE Table

Posted: Sat Jan 12, 2019 1:48 pm
Are ice tables always based on concentrations?

### Re: ICE Table

Posted: Sat Jan 12, 2019 1:55 pm
You can use ICE tables for concentrations but you can also fill ICE tables with values of partial pressure.

### Re: ICE Table

Posted: Sat Jan 12, 2019 4:43 pm
005168414 wrote:Basically, yes; whenever you set up the ICE table, you start by assuming that the reaction hasn't taken place yet. Therefore, there won't be any products formed yet, so their initial concentrations are 0.

So if we assume that the reaction hasn't happened yet, is that why for anything that has an intial concentration of 0, the change in molarity is always X?

### Re: ICE Table

Posted: Sat Jan 12, 2019 5:57 pm
Eruchi Okpara 2E wrote:
005168414 wrote:Basically, yes; whenever you set up the ICE table, you start by assuming that the reaction hasn't taken place yet. Therefore, there won't be any products formed yet, so their initial concentrations are 0.

So if we assume that the reaction hasn't happened yet, is that why for anything that has an intial concentration of 0, the change in molarity is always X?

The change in molarity depends on the stoichiometric coefficient of the substance. For example, if the coefficient is 2, then the change is 2X.