pH in changing temperature

Acidity
Basicity
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Jessica Beroukhim 3K
Posts: 21
Joined: Fri Sep 29, 2017 7:07 am

pH in changing temperature

Postby Jessica Beroukhim 3K » Tue Dec 05, 2017 4:44 pm

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

Ryan Sydney Beyer 2B
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Joined: Fri Sep 29, 2017 7:07 am
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Re: pH in changing temperature

Postby Ryan Sydney Beyer 2B » Tue Dec 05, 2017 5:52 pm

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.

Navleen Bajwa 3A
Posts: 20
Joined: Fri Sep 29, 2017 7:06 am

Re: pH in changing temperature

Postby Navleen Bajwa 3A » Fri Dec 08, 2017 1:00 am

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.

Cindy Nguyen 1L
Posts: 48
Joined: Fri Apr 06, 2018 11:04 am

Re: pH in changing temperature

Postby Cindy Nguyen 1L » Tue Jun 05, 2018 8:30 pm

If it has the same amount, how does pH decrease? What effect does temperature have in this situation?

Steven Luong 1E
Posts: 33
Joined: Fri Apr 06, 2018 11:03 am

Re: pH in changing temperature

Postby Steven Luong 1E » Wed Jun 06, 2018 11:01 pm

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.


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