March 28, 2024, 11:11:35 AM
Forum Rules: Read This Before Posting


Topic: pH<0 and pH>14?  (Read 1975 times)

0 Members and 1 Guest are viewing this topic.

Offline hahaha7

  • Very New Member
  • *
  • Posts: 1
  • Mole Snacks: +0/-0
pH<0 and pH>14?
« on: November 10, 2014, 08:21:52 AM »
Is it possible for having cases where the pH is less than 0 and pH greater than 14?
I thought of an example for pH < 0, where you have a 12 M HCl solution to give a pH of -log(12) = -1.08
How about for pH > 14? I cant think of an example to illustrate this. Could anyone help me out with this?
Thanks for your *delete me*

Offline billnotgatez

  • Global Moderator
  • Sr. Member
  • ***
  • Posts: 4400
  • Mole Snacks: +223/-62
  • Gender: Male
Re: pH<0 and pH>14?
« Reply #1 on: November 10, 2014, 08:57:40 AM »
I am wondering what 399.971 grams of Sodium Hydroxide in 1 liter would give you what pH?

Offline curiouscat

  • Chemist
  • Sr. Member
  • *
  • Posts: 3006
  • Mole Snacks: +121/-35
Re: pH<0 and pH>14?
« Reply #2 on: November 10, 2014, 11:37:20 AM »
Change Temperature?

Offline Borek

  • Mr. pH
  • Administrator
  • Deity Member
  • *
  • Posts: 27637
  • Mole Snacks: +1799/-410
  • Gender: Male
  • I am known to be occasionally wrong.
    • Chembuddy
Re: pH<0 and pH>14?
« Reply #3 on: November 10, 2014, 03:33:25 PM »
Is it possible for having cases where the pH is less than 0 and pH greater than 14?

Definitely.

Quote
I thought of an example for pH < 0, where you have a 12 M HCl solution to give a pH of -log(12) = -1.08

Good thinking, just beware - in concentrated solutions things stop being what you think they are. pH of 12 M HCl is definitely negative, but it is also definitely not just -1.08.

Compare http://www.chembuddy.com/?left=pH-calculation&right=ionic-strength-activity-coefficients

Quote
How about for pH > 14? I cant think of an example to illustrate this. Could anyone help me out with this?

See billnotgatez post. How is pH linked with pOH?
ChemBuddy chemical calculators - stoichiometry, pH, concentration, buffer preparation, titrations.info

Sponsored Links