Also known as: PH., PH-
PH has various meanings in the Ordnance Survey category. Discover the full forms, definitions, and usage contexts of PH in Ordnance Survey.
PH is a measure of hydrogen ion concentration, a measure of the acidity or alkalinity of a solution. Aqueous solutions at 25°C with a pH less than seven are acidic, while those with a pH greater than seven are basic or alkaline.
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