| appearance as argument number 1 |
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| (documentation PotentialOfHydrogen EnglishLanguage "In chemistry, pH denoting 'potential of hydrogen' or 'power of hydrogen', is a scale used to specify the acidity or basicity of an aqueous solution. Acidic solutions (solutions with higher concentrations of H+ ions) are measured to have lower pH values than basic or alkaline solutions. The pH scale is logarithmic and inversely indicates the concentration of hydrogen ions in the solution. This is because the formula used to calculate pH approximates the negative of the base 10 logarithm of the molar concentration[a] of hydrogen ions in the solution. More precisely, pH is the negative of the base 10 logarithm of the activity of the H+ ion.[from Wikipedia]") | Mid-level-ontology.kif 9871-9881 | |
| (instance PotentialOfHydrogen AcidityMeasure) | Mid-level-ontology.kif 9869-9869 | Potential of hydrogen is an instance of acidity measure |
| appearance as argument number 2 |
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| (termFormat EnglishLanguage PotentialOfHydrogen "potential of hydrogen") | domainEnglishFormat.kif 65346-65346 |
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Sigma version 3.0 is open source software produced by Articulate Software and its partners