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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: kenny122 on November 11, 2007, 03:51:41 PM

Title: Fe2O3(s) + HCL(l) = ??
Post by: kenny122 on November 11, 2007, 03:51:41 PM

can't figure this one out either. ???

Title: Re: Fe2O3(s) + HCL(l) = ??
Post by: LQ43 on November 11, 2007, 04:32:44 PM

acid - base reaction

or you can think of it like a double replacement/metathesis reaction

Title: Re: Fe2O3(s) + HCL(l) = ??
Post by: kenny122 on November 11, 2007, 05:48:46 PM

ok, so i got    Fe2O3+3HCL=Fe2Cl3+3OH   

now the problem becomes...i need to calculate the molar heat of formation of Fe203, without looking cheating and using the table. and then once i get my own value, i have to calculate the percentage error. now i'm seriously stuck. i have a whole series of questions if that would help.but i have figured out pretty much everything but this one little question.

Title: Re: Fe2O3(s) + HCL(l) = ??
Post by: LQ43 on November 11, 2007, 05:55:29 PM

Quote from: kenny122 on November 11, 2007, 05:48:46 PM

ok, so i got    Fe2O3+3HCL=Fe2Cl3+3OH    

now the problem becomes...i need to calculate the molar heat of formation of Fe203, without looking cheating and using the table. and then once i get my own value, i have to calculate the percentage error. now i'm seriously stuck. i have a whole series of questions if that would help.but i have figured out pretty much everything but this one little question.

OH is not a product, what do you get when you put together O2- and H+? acid and a base give ?

Hess's Law

sum of the heats of the products - sum of the heats of the reactants = heat of reaction

you need the heats of formation of HCl, FeCl3 and the other  and the heat of reaction to get heat of Fe2O3