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pH in changing temperature

Posted: Tue Dec 05, 2017 4:44 pm
by Jessica Beroukhim 3K
Would the pH of pure water increase or decrease with increasing temperature? Does this mean that pure water is acidic/basic at temperatures other than 25 C or that the entire pH scale is different at other temperatures? Thanks

Re: pH in changing temperature

Posted: Tue Dec 05, 2017 5:52 pm
by Ryan Sydney Beyer 2B
The pH of pure water decreases with increasing temp. If the pH falls and the temp is increased, this does not mean that water becomes more acidic at higher temps. For pure water, there is always the same concentration of hydrogen ions and hydroxide ions so water is still neutral (pH = pOH) even if its pH changes.

Re: pH in changing temperature

Posted: Fri Dec 08, 2017 1:00 am
by Navleen Bajwa 3A
pH of pure water decreases as the temperature increases. Although the pH of pure water changes with temperature, it is important to realize that it is still neutral. In the case of pure water, there are going to be the same number of hydrogen ions and hydroxide ions.

Re: pH in changing temperature

Posted: Tue Jun 05, 2018 8:30 pm
by Cindy Nguyen 1L
If it has the same amount, how does pH decrease? What effect does temperature have in this situation?

Re: pH in changing temperature

Posted: Wed Jun 06, 2018 11:01 pm
by Steven Luong 1E
The pH of pure water decreases with increasing temp. If the pH falls and the temp is increased, water is still not acidic as the concentrations of H+ and OH- are the same pH = pOH.