Test 2 Question

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Test 2 Question

Postby Tiffany_Cacy_3D » Mon Mar 11, 2019 9:16 am

Hello, it has been a while since we took test two but I am still really confused about one of the problems. I am sure it varied slightly for other people but a brief outline of how to do this problem would be really helpful. The question was....
5. The ionic dissociation of water us given by the following reaction: The Delta H for the reaction is 58 kJ/mol. The Kw for the reaction at 25 C is 10^{-14}. Is the pH of 7 acidic or basic at 10 C?

Any tips are appreciated, thank you!!

Kayla Vo 1B
Posts: 60
Joined: Fri Sep 28, 2018 12:26 am

Re: Test 2 Question

Postby Kayla Vo 1B » Mon Mar 11, 2019 9:26 am

To solve this problem try using the van't Hoff equation and solve for K2 (make sure the temperature is in Kelvin). Using that value, you can solve for the concentration of H+ and then the pH.

Return to “Appications of the Nernst Equation (e.g., Concentration Cells, Non-Standard Cell Potentials, Calculating Equilibrium Constants and pH)”

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