Negative pH

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805312064
Posts: 50
Joined: Thu Jul 11, 2019 12:16 am

Negative pH

Postby 805312064 » Thu Jan 16, 2020 5:28 pm

Can a pH be 0 or negative? If so, what would that mean?

Vincent Leong 2B
Posts: 207
Joined: Fri Aug 09, 2019 12:15 am

Re: Negative pH

Postby Vincent Leong 2B » Thu Jan 16, 2020 5:51 pm

Yes, a pH can be below 0. This just tells us that the molarity of hydrogen ions is greater than 1. Theoretically it is possible but in a lab, that can rarely be observed.

Connor Chappell 2B
Posts: 59
Joined: Wed Feb 20, 2019 12:16 am

Re: Negative pH

Postby Connor Chappell 2B » Thu Jan 16, 2020 5:53 pm

The conventional scale of ph being between 0 and 14 is dewrvied from reactions with water at room temperature.

Diana_Diep2I
Posts: 130
Joined: Sat Aug 17, 2019 12:17 am

Re: Negative pH

Postby Diana_Diep2I » Thu Jan 16, 2020 5:53 pm

You get a negative pH when the concentration provided is greater than 1

EvanWang
Posts: 101
Joined: Sat Sep 07, 2019 12:16 am

Re: Negative pH

Postby EvanWang » Thu Jan 16, 2020 6:07 pm

Yes, pH can be negative and it just means that the molarity of H+ is greater than 1. Google tells me that some acids have been observed at pH -18.

Sarah Zhari 1D
Posts: 103
Joined: Sat Sep 14, 2019 12:16 am

Re: Negative pH

Postby Sarah Zhari 1D » Thu Jan 16, 2020 6:25 pm

You can definitely have an acid with a negative pH, although this would be very rare. Additionally, very strong bases can also have a pH of more than 14.

Hailey Kim 4G
Posts: 110
Joined: Sat Jul 20, 2019 12:16 am

Re: Negative pH

Postby Hailey Kim 4G » Thu Jan 16, 2020 6:31 pm

If a pH is less than 0 or greater than 14, that means the concentrations of H30+ or OH- are larger than one molar. However, the concentration of hydrogen ions are usually between 1 M or 10^-14 M.


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