Description Usage Arguments Value Author(s) Examples
This function calculates and plots the precipitation titration curve for a mixture of two analytes using a titrant that form precipitates with 1:1 stoichiometries. The calculation uses a single master equation that finds the volume of titrant needed to achieve a fixed concentration of titrant, expressed as pTitrant, as outlined in R. de Levie's Principles of Quantitative Chemical Analysis (McGraw-Hill, 1997).
1 2 3 |
conc.analyte1 |
Molar concentration of the first analyte; defaults to 0.050 M. |
conc.analyte2 |
Molar concentration of the second analyte; defaults to 0.050 M. |
vol.analyte |
The initial olume, in mL, of the solution containing the analyte; defaults to 25.00 mL. |
conc.titrant |
Molar concentration of the titrant; defaults to 0.050 M. |
pksp1 |
The pKsp value for the first analyte's precipitate; defaults to 16.08, which is the pKsp for AgI. |
pksp2 |
The pKsp value for the second analyte's precipitate; defaults to 11.97, which is the pKsp for AgSCN. |
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 pTitrant 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
1 2 3 4 5 6 7 | ### Simple titration curve with equivalence points
ex15 = ppt_mixture(eqpt = TRUE)
head(ex15)
### Overlay mixture titration curves using different pKsp values
ppt_mixture(pksp1 = 16, pksp2 = 12, eqpt = TRUE)
ppt_mixture(pksp1 = 14, pksp2 = 10, overlay = TRUE)
|
volume p.titrant
1 99.80291 1.70
2 97.94456 1.71
3 96.18121 1.72
4 94.50619 1.73
5 92.91344 1.74
6 91.39743 1.75
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