Citric acid is a pure substance made of solid crystals. pH is a property of aqueous solutions . It indicates the negative exponent of the molar concentration of hydrated hydrogen ions in water, expressed as power of ten. Citric acid has not a ” pH ” of its own. To get a pH (presence of free hydrated hydrogen ions) you must dissolve a certain amount of citric acid in a given volume of water. This pH will be acidic, quite low (between 2-3) if the solution is not highly diluted, because citric acid is a relatively strong acid among the organic acids.
