How temperature affects pH

Moderators: Chem_Mod, Chem_Admin

Mei Blundell_1J
Posts: 32
Joined: Fri Apr 06, 2018 11:01 am
Been upvoted: 1 time

How temperature affects pH

Postby Mei Blundell_1J » Thu Jun 07, 2018 7:46 pm

Why and how does temperature affect pH?

Toru Fiberesima 1L
Posts: 63
Joined: Fri Apr 06, 2018 11:02 am

Re: How temperature affects pH

Postby Toru Fiberesima 1L » Thu Jun 07, 2018 8:23 pm

Technically temperature should have no real effect on pH, however, since water undergoes deconstruction of some sort from H2O -> OH- + H,
and there are 2x H. Since pH quantifies the quantity of H+ in a solution, the pH would be slighlty lower/more acidic in higher temperatures.

Posts: 18676
Joined: Thu Aug 04, 2011 1:53 pm
Has upvoted: 610 times

Re: How temperature affects pH

Postby Chem_Mod » Thu Jun 14, 2018 5:16 pm

pH is just a measure of [H30+], so pH shows the concentration of H3O+. When temperature changes, the auto-ionization constant of water changes slightly too due to the different conditions. So, pH does slightly change with change in termpature. However, the change is slight that you can ignore it for most room temperature conditions.

Posts: 47
Joined: Fri Sep 28, 2018 12:17 am

Re: How temperature affects pH

Postby 404982241 » Sun Dec 02, 2018 9:28 pm

ph decreases as temperature increases. The molecular vibrations increase which results in the ability of water to ionise and form more hydrogen ions.

Return to “Calculating the pH of Salt Solutions”

Who is online

Users browsing this forum: No registered users and 0 guests