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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.
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!
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