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Glossary entry (derived from question below)
English term or phrase:
potential
English answer:
a measure or scale [pH = Hydrogen ion potential / H+ potential / potential Hydrogen]
Added to glossary by
acetran
Jul 13, 2016 15:54
8 yrs ago
1 viewer *
English term
potential
English
Medical
Medical (general)
asthma
Các bác cho em hỏi potential trong context này là điện thế hay mang nghĩa khác?
Context
The scale is pH 1 to pH 14, which converts to a range of 10-1 (1) to 10-14 (.00000000000001) moles of hydrogen ions.
This means that a pH of 14 maintains fewer hydrogen ions.
It is thus less acidic and more alkaline (or basic).
The pH scale has been set up around the fact that water’s pH is log-7 or simply pH 7 due to water’s natural mineral content.
A substance having greater hydrogen ion potential (but lower pH) than water will be considered acidic, while a substance with less H+ potential (higher pH) than water is considered a base (alkaline).
Context
The scale is pH 1 to pH 14, which converts to a range of 10-1 (1) to 10-14 (.00000000000001) moles of hydrogen ions.
This means that a pH of 14 maintains fewer hydrogen ions.
It is thus less acidic and more alkaline (or basic).
The pH scale has been set up around the fact that water’s pH is log-7 or simply pH 7 due to water’s natural mineral content.
A substance having greater hydrogen ion potential (but lower pH) than water will be considered acidic, while a substance with less H+ potential (higher pH) than water is considered a base (alkaline).
Responses
+3
10 mins
Selected
a measure or scale [pH = Hydrogen ion potential / H+ potential / potential Hydrogen]
pH = Hydrogen ion potential / H+ potential / potential Hydrogen
pH is the abbreviation for potential hydrogen, a scale representing the relative acidity (or alkalinity) of a solution, in which a value of 7.0 is neutral, below 7.0 is acid, and above 7.0 is alkaline.
pH: potential of hydrogen; a measure of the acidity or alkalinity of a solution equal to the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimetre of solution. Pure water has a pH of 7, acid solutions have a pH less than 7, and alkaline solutions a pH greater than 7
http://medical-dictionary.thefreedictionary.com/Potential of...
http://www.thefreedictionary.com/Potential of hydrogen
pH is the abbreviation for potential hydrogen, a scale representing the relative acidity (or alkalinity) of a solution, in which a value of 7.0 is neutral, below 7.0 is acid, and above 7.0 is alkaline.
pH: potential of hydrogen; a measure of the acidity or alkalinity of a solution equal to the common logarithm of the reciprocal of the concentration of hydrogen ions in moles per cubic decimetre of solution. Pure water has a pH of 7, acid solutions have a pH less than 7, and alkaline solutions a pH greater than 7
http://medical-dictionary.thefreedictionary.com/Potential of...
http://www.thefreedictionary.com/Potential of hydrogen
4 KudoZ points awarded for this answer.
Comment: "Thanks, acetran!"
-1
3 hrs
Jörgen Slet
Estonia
Estonia
Works in field
Estonia
19 years of biomedical translation
Native in: Estonian 
Works in: English to Estonian, Estonian to English
Related KudoZ points
:
16
(ionic) activity
I think they actually mean hydrogen ion "activity" or "effective/apparent concentration" (actual concentration minus interactions that diminish the effective concentration).
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Note added at 3 hrs (2016-07-13 19:29:20 GMT)
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Since the text suggests that higher "potential" means lower pH, it cannot be the "p" in pH (the etymology of "p" in pH is unclear, http://en.wikipedia.org/wiki/PH#History)
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Note added at 12 hrs (2016-07-14 04:39:14 GMT)
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The text seems to simply misuse the word "potential" for concentration, or ionic activity:
1) The text is simplistic, intended for general audience. It is unlikely to discuss chemical potential of hydrogen ion, or any other "potentials".
2) It already somewhat misuses "substances" - the text only applies to aqueous solutions. Acidity in non-aqueous solutions, other liquids, superacids, gases, solids etc is more complicated.
3) "due to water’s natural mineral content" also seems to be an error.
They likely meant simple concentration of H+. Or ionic activity, which is effective concentration.
They probably got confused by the letter "p" in "pH", like many do.
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Note added at 3 hrs (2016-07-13 19:29:20 GMT)
--------------------------------------------------
Since the text suggests that higher "potential" means lower pH, it cannot be the "p" in pH (the etymology of "p" in pH is unclear, http://en.wikipedia.org/wiki/PH#History)
--------------------------------------------------
Note added at 12 hrs (2016-07-14 04:39:14 GMT)
--------------------------------------------------
The text seems to simply misuse the word "potential" for concentration, or ionic activity:
1) The text is simplistic, intended for general audience. It is unlikely to discuss chemical potential of hydrogen ion, or any other "potentials".
2) It already somewhat misuses "substances" - the text only applies to aqueous solutions. Acidity in non-aqueous solutions, other liquids, superacids, gases, solids etc is more complicated.
3) "due to water’s natural mineral content" also seems to be an error.
They likely meant simple concentration of H+. Or ionic activity, which is effective concentration.
They probably got confused by the letter "p" in "pH", like many do.
Reference:
Peer comment(s):
| disagree |
Cilian O'Tuama
: The higher the H+ concentration, the lower the pH and the more acidic the substance is...
3 hrs
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Yes, and the text appears to call this H+ concentration "H+ potential". (Since it uses conventional pH, 1-14, I assume aqueous solutions, and H+ concentration or activity as usual measure of acidity. Not, e.g., the absolute chemical potential of H+).
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