Description Usage Arguments Value Author(s) Examples
This function calculates and plots the titration curve for a diprotic weak base analyte using a monoprotic strong acid as the titrant. The calculation uses a single master equation that finds the volume of titrant needed to achieve a fixed pH, as outlined in R. de Levie's Principles of Quantitative Chemical Analysis (McGraw-Hill, 1997).
1 2 3 |
conc.base |
Molar concentration of the diprotic weak base analyte; defaults to 0.10 M. |
conc.acid |
Molar concentration of the strong base titrant; defaults to 0.10 M. |
pka1 |
The pKa1 value for the diprotic weak base analyte's conjugate weak acid; defaults to a pKa1 of 5, or a pKb2 of 9 for the weak base analyte. |
pka2 |
The pKa2 value for the diprotic weak base analyte's conjugate weak acid; defaults to a pKa2 of 9, or a pKb1 of 5. |
pkw |
The pKw (or pKs) value for the solvent; defaults to water as a solvent with a pKw of 14. |
vol.base |
The initial volume, in mL, of the solution that contains the weak base analyte; defaults to 50.00 mL. |
plot |
Logical; if TRUE, plots the titration curve. |
eqpt |
Logical; if TRUE, draws a vertical line at the titration curve's equivalence point. |
overlay |
Logical; if TRUE, adds the current titration curve to the existing titration curve. |
... |
Additional arguments to pass to |
A two-column data frame that contains the volume of titrant in the first column and the solution's pH in the second column. Also produces a plot of the titration curve with options to display the equivalence point and to overlay titration curves.
David T. Harvey, DePauw University. harvey@depauw.edu
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volume ph
1 0.01767360 10.99
2 0.04025902 10.98
3 0.06286702 10.97
4 0.08550889 10.96
5 0.10819592 10.95
6 0.13093942 10.94
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