redox_titration: Redox Titration Curve

In dtharvey/titrationCurves: Acid/Base, Complexation, Redox, and Precipitation Titration Curves

Description

This function calculates and plots the titration curve for a reducing agent analyte using an oxidizing agent as the titrant. The calculation uses a single master equation that finds the volume of titrant needed to achieve a fixed potential, as outlined in R. de Levie's Principles of Quantitative Chemical Analysis (McGraw-Hill, 1997).

Usage

redox_titration(conc.analyte = 0.01, vol.analyte = 25, pot.analyte = 0.77,
  elec.analyte = 1, conc.titrant = 0.01, pot.titrant = 1.7,
  elec.titrant = 1, plot = TRUE, eqpt = FALSE, overlay = FALSE, ...)

Arguments

conc.analyte	Molar concentration of the analyte; defaults to 0.010 M.
vol.analyte	Initial volume, in mL, of the solution containing the analyte; defaults to 25.00 mL.
pot.analyte	Standard state or formal potential for the analyte's half-reaction in V; defaults to 0.77 V.
elec.analyte	The number, n, of electrons lost by the analyte in its oxidation half-reaction; defaults to 1.
conc.titrant	Molar concentration of the titrant; defaults to 0.010 M.
pot.titrant	Standard state or formal potential for the titrant's half-reaction in V; defaults to 1.7 V.
elec.titrant	The number, n, of electrons gained by the analyte in its reduction half-reaction; defaults to 1.
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 plot() function.

Value

A two-column data frame that contains the volume of titrant in the first column and the solution's potential in the second column. Also produces a plot of the titration curve with options to display the equivalence point and to overlay titration curves.

Author(s)

David T. Harvey, DePauw University. [e-mail]

Examples

### Simple titration curve with equivalence point
ex12 = redox_titration(eqpt = TRUE)
head(ex12)

### Overlay titration curves using different potentials for tirant
redox_titration(pot.titrant = 1.7, eqpt = TRUE)
redox_titration(pot.titrant = 1.5, overlay = TRUE)
redox_titration(pot.titrant = 1.3, overlay = TRUE)

dtharvey/titrationCurves documentation built on March 8, 2020, 4:50 a.m.