3 ms·

Yeah I mean this is high-school level chemistry, right?

icepat 3y ago
Essentially yes, what's a bit more interesting is Lewis Acid theory, as well as acid ionisation reactions. Lewis theory makes a lot of generally non acidic things technically acidic: https://chemed.chem.purdue.edu/genchem/topicreview/bp/ch11/lewis.php#:~:text=A%20Lewis%20acid%20is%20therefore,therefore%20an%20electron%2Dpair%20donor https://chemed.chem.purdue.edu/genchem/topicreview/bp/ch11/l....
- gilleain 3y ago
  As another interesting semi-related topic, what about https://en.wikipedia.org/wiki/Superacid https://en.wikipedia.org/wiki/Superacid - they are super! Also one of them is magic! https://en.wikipedia.org/wiki/Magic_acid https://en.wikipedia.org/wiki/Magic_acid :)
  - mikeyouse 3y ago
    I was just remembering these while playing with my pool chemistry. Had the fleeting memory of negative pHs too -- always fun when a maxim you're taught in early education (pH scale is from 0 - 14) is later given a few exceptions. https://www.thoughtco.com/is-a-negative-ph-possible-603653 https://www.thoughtco.com/is-a-negative-ph-possible-603653
    - icepat 3y ago
      Well, negative pH is mathematically impossible, given that pH is the -log of the hydrogen ion concentration. It makes no physical sense to discuss "negative hydrogen ion concentration". If anything, it's mostly a shorthand than an actual phenomenon.
      - tmearnest 3y ago
        Check this out https://chemistry.stackexchange.com/questions/5737/is-a-negative-ph-level-physically-possible https://chemistry.stackexchange.com/questions/5737/is-a-nega...
      - mikeyouse 3y ago
        If you go one step further than the simple math formula - pH isn't just describing the concentration of hydrogen ions in a solution but rather that solution's ability to donate/accept H+ ions. So a solution of strong acid which is inhibited to fully dissociate into H+ and it's anion would have a pH much lower than the measured value in the solution. As H+ ions are donated, the acid in solution further dissociates providing more H+ ions, so clearly the solution is more acidic than originally measured. This is how mine water and volcanic hot springs end up with negative pH; https://core.ac.uk/download/pdf/17247528.pdf https://core.ac.uk/download/pdf/17247528.pdf
  - PlasmonOwl 3y ago
    My first ever lecture was on magic acid in 2012! Ha. Introductory inorganic chemistry

Essentially yes, what's a bit more interesting is Lewis Acid theory, as well as acid ionisation reactions. Lewis theory makes a lot of generally non acidic things technically acidic: https://chemed.chem.purdue.edu/genchem/topicreview/bp/ch11/lewis.php#:~:text=A%20Lewis%20acid%20is%20therefore,therefore%20an%20electron%2Dpair%20donor https://chemed.chem.purdue.edu/genchem/topicreview/bp/ch11/l....

gilleain 3y ago
As another interesting semi-related topic, what about https://en.wikipedia.org/wiki/Superacid https://en.wikipedia.org/wiki/Superacid - they are super! Also one of them is magic! https://en.wikipedia.org/wiki/Magic_acid https://en.wikipedia.org/wiki/Magic_acid :)
- mikeyouse 3y ago
  I was just remembering these while playing with my pool chemistry. Had the fleeting memory of negative pHs too -- always fun when a maxim you're taught in early education (pH scale is from 0 - 14) is later given a few exceptions. https://www.thoughtco.com/is-a-negative-ph-possible-603653 https://www.thoughtco.com/is-a-negative-ph-possible-603653
  - icepat 3y ago
    Well, negative pH is mathematically impossible, given that pH is the -log of the hydrogen ion concentration. It makes no physical sense to discuss "negative hydrogen ion concentration". If anything, it's mostly a shorthand than an actual phenomenon.
    - tmearnest 3y ago
      Check this out https://chemistry.stackexchange.com/questions/5737/is-a-negative-ph-level-physically-possible https://chemistry.stackexchange.com/questions/5737/is-a-nega...
    - mikeyouse 3y ago
      If you go one step further than the simple math formula - pH isn't just describing the concentration of hydrogen ions in a solution but rather that solution's ability to donate/accept H+ ions. So a solution of strong acid which is inhibited to fully dissociate into H+ and it's anion would have a pH much lower than the measured value in the solution. As H+ ions are donated, the acid in solution further dissociates providing more H+ ions, so clearly the solution is more acidic than originally measured. This is how mine water and volcanic hot springs end up with negative pH; https://core.ac.uk/download/pdf/17247528.pdf https://core.ac.uk/download/pdf/17247528.pdf
- PlasmonOwl 3y ago
  My first ever lecture was on magic acid in 2012! Ha. Introductory inorganic chemistry