Ph Values

Some articles on ph, value, ph values:

Acid-base Extraction - Theory
... like mescaline or dimethyltryptamine (pKb around 3–4) Usually the pH is adjusted to a value roughly between the pKa (or pKb) constants of the compounds to be separated ... phosphoric acid, or diluted sulfuric acid are used for moderately acidic pH values and hydrochloric acid or more concentrated sulfuric acid is used for strongly acidic pH values ... weak bases like ammonia or sodium bicarbonate (NaHCO3) are used for moderately basic pH values while stronger bases like potassium carbonate (K2CO3) or sodium hydroxide (NaOH ...
Negative P H - Definition and Measurement - Non-aqueous Solutions
... pH values based on these measurements belong to a different scale from aqueous pH values, because activities relate to different standard states ... Therefore pH values on the different scales cannot be compared directly ... pH is an example of an acidity function ...

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