What is the concentration of hydronium ions (H3O+) or free unbound protons (H+) as an equivalent of pH=7.4 in water solution?

From definition of pH is known that an activity of hydrogen ions is 10^(-pH). The activity of substance is activity coeficient multiplied by physical concentration (in units "mol/mol"). So if we...

04 April 2015 1,233 36 View