pH is a term used to define the intensity of a solution’s acid or alkaline condition. It is essentially a scale derived from the concentration of hydrogen ions in the solution.
IMPORTANCE OF pH
It is a crucial factor affecting all aspects of water chemistry, and therefore plays an important role in many water and wastewater treatment processes such as coagulation, disinfection, chemical precipitation, corrosion control, oxidation, and activated sludge.
The pH scale is usually represented as ranging from 0 to 14, where pH less than 7 represents acidic conditions while pH higher than 7 represents alkaline conditions with pH 7 at 25 °C representing absolute neutrality.