pH and van’t hoff

[Marsenne Cabral 1A]

why would the neutral ph change from 7 in a chemical reaction and how is that possible?

[Ashley Kim]

The neutral pH can change with temperature, because pH is not constant with temperature.

[Kathryn Wilhem 1I]

With a temperature change, the K changes, so then the pH would also change because the concentration of H+ changes.

[Joonsoo Kim 4L]

When temperature increases, the Kw increases as well, which causes the neutral [H+] to increase and neutral pH to decrease. On the flip side, when temperature decreases, the Kw and neutral [H+] decrease, so the neutral pH increases. Neutral pH of 7 is only true at 298K.

[Yvonne Du]

When temperature increases, the Kw increases as well, which causes the neutral [H+] to increase and neutral pH to decrease. On the flip side, when temperature decreases, the Kw and neutral [H+] decrease, so the neutral pH increases. Neutral pH of 7 is only true at 298K.

Thank you this is very helpful!

[Jonathan Christie 1I]

Thank you, this was a big help in figuring out where I went wrong on the Vant Hoff problem on test 2

[Roberto Gonzalez 1L]

A neutral pH of 7 is only true for water at 25 degrees celsius. As the temperature changes, Kw changes and therefore as [h30+] is calculated by taking the square root of Kw, the neutral pH value will differ accordingly.