An 'adjustable' calculator program to determine fraction of species versus pH profiles for mono-, di- or triprotic...

A calculator program for TI-58/59 is presented which determines the fraction of dissociated and undissociated species of weak acids and bases, provided values for dissociation constants and pH are known. The answers are displayed in exponential notation. The calculations can be repeated at as many pH-values as required to obtain a satisfactory fraction of species versus pH profile. The program is made 'adjustable' by deleting selected program steps to accommodate calculations for mono-, di- or triprotic weak acids or bases.