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Navigation: User Guide ➔ Stream Properties ➔ Acidity (pH)

Standard Species Model Stream Properties Special Cases
Species Model
Stream Properties
Density Heat of Formation Heat of Dilution Specific Heat
Solubility Boiling Point Elevation pH Charge Steam and Water Sulfuric Acid


The pH of a liquid solution is the negative log of the Hydrogen ion molar concentration in solution at 25 degrees C. This is often the basis for calculating the pH of a solution. However, since SysCAD does NOT include calculations for buffering, this is an estimate of the pH only.

SysCAD uses the standard equation for autoionisation of water at 25 degrees C:

pKw = 14 = pH + pOH


pH = -log[H+]

pOH = -log[OH-]

Implementation in SysCAD