5I.29 7th Edition

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klarratt2
Posts: 60
Joined: Fri Sep 28, 2018 12:16 am

5I.29 7th Edition

Postby klarratt2 » Tue Jan 15, 2019 4:57 pm

I worked out this problem and got that the equilibrium partial pressures of H2 and Cl2 are 8.39x10^-18 bar, but the book says that the answer is 3.9x10^-18 bar. I'm trying to find where I went wrong, does anyone know what I could have done?

Matthew Tran 1H
Posts: 165
Joined: Fri Sep 28, 2018 12:16 am

Re: 5I.29 7th Edition

Postby Matthew Tran 1H » Tue Jan 15, 2019 8:14 pm

You most likely made an algebraic error when solving the quadratic formula. You could have avoided this altogether if you approximated that 0.22-2x ~ 0.22 since x will be really, really small (K=3.2 x 10^-34) and will basically not have a significant change on the concentration of HCl. This will make your calculation way easier and less prone to mistakes.


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