pH range

[Brian_Ho_2B]

Is it possible for a pH level to go under 0 or above 14? Is it possible for hydronium concentrations to be above 1M (for pH less than 0) or hydroxide concentrations more than 1M (for pH greater than 14)?

[McKenna_4A]

Yes, however it is very uncommon

[Fiona Latifi 1A]

Yes, if a solution is VERY acidic or VERY basic.

[Sebastian Lee 1L]

Yes, it is indeed possible to have pH outside of the range from 0 to 14. For example, if you had a solution of 10M HCl (a strong acid), you would find the pH = -log(H+) to be -1. Of course, this would be a tremendously strong acid solution. Likewise for very strong bases, if you had a solution of 10M NaOH (a strong base) you'd find the pOH = -log(OH-) to be -1 and thus the pH to be 15.

[Alondra]

Yes, the range is 0-14. This is rare but it shows that it is either a very strong acid/base.