## Test 2 Question

$E_{cell} = E_{cell}^{\circ}-\frac{RT}{nF}\ln Q$

Tiffany_Cacy_3D
Posts: 70
Joined: Fri Sep 28, 2018 12:24 am

### Test 2 Question

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

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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