pH and pOH

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Kendall_Islam_3A
Posts: 20
Joined: Wed Sep 21, 2016 2:57 pm

pH and pOH

Postby Kendall_Islam_3A » Mon Nov 21, 2016 12:54 pm

What does the p stand for in pH and pOH? I know pH means -log[H+] and pOH means -log[OH-], but why was the letter p chosen, and what does it mean?

emilyharland
Posts: 22
Joined: Fri Jul 15, 2016 3:00 am

Re: pH and pOH

Postby emilyharland » Mon Nov 21, 2016 12:56 pm

p is a shorthand notation for -log that is written to simplify the equations

Shelby Slaughter 3D
Posts: 24
Joined: Fri Jul 15, 2016 3:00 am

Re: pH and pOH

Postby Shelby Slaughter 3D » Mon Nov 21, 2016 1:43 pm

I've heard that it stands for potential, but other sources say it was just chosen at random. Here is a short article about it.http://cultureofchemistry.fieldofscienc ... ds-ph.html

Ryan Petrecca 1L
Posts: 16
Joined: Wed Sep 21, 2016 2:59 pm

Re: pH and pOH

Postby Ryan Petrecca 1L » Mon Nov 21, 2016 5:03 pm

I believe p means something along the lines of "power of (hydrogen)" or I have also heard it used as "potential of (hydrogen)."

Sophia Eliopulos 2I
Posts: 21
Joined: Wed Sep 21, 2016 2:56 pm

Re: pH and pOH

Postby Sophia Eliopulos 2I » Mon Nov 21, 2016 5:08 pm

pOH = -log[OH-]

the negative log of the hydroxide ion molarity

pKw = -log Kw

the negative log of the water ion product , Kw

pKa = -log Ka

the negative log of the acid dissociation constant, Ka

pKb = -log Kb

the negative log of the base dissociation constant, Kb


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