## Test 2

$\Delta G^{\circ} = -nFE_{cell}^{\circ}$

alanaarchbold
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Joined: Fri Sep 28, 2018 12:27 am

### Test 2

Can someone list the steps for the pH question from test two please

Chem_Mod
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### Re: Test 2

The idea is to calculate Kw at non-room temperature using Nernst Equation. When you know Kw, you can find the concentration of H3O+ in a neutral solution at that temperature by taking the square root of Kw and calculate the PH of the neutral solution.

Chloe Thorpe 1J
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Joined: Fri Sep 28, 2018 12:16 am

### Re: Test 2

I thought we weren't supposed to use the Nernst equation on test 2?

Lauren Huang 1H
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Joined: Fri Sep 28, 2018 12:16 am

### Re: Test 2

I think they meant the Van't Hoff equation; it was provided to us on the equation sheet.

Sapna Ramappa 1J
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Joined: Fri Sep 28, 2018 12:24 am

### Re: Test 2

Use Van't Hoff to find the new kw with the temperature change. Then, take the square root of the new kw to find the concentration of H3O+. Then, you can take -log[H3O+] to find pH, which you can now compare to the pH of 7! Hope this helps!