You will observe the potentiometric titration of a weak acid (0.020 M H2SO3). Although this is not one of the assigned samples, it serves as a useful example. You will then be presented with the data for the solutions in the table below in order to compare the titration curves of different types (acid vs base), strengths (strong vs weak) and concentrations (0.010 M vs 0.020 M) of solutions.
Note: Sulfurous acid, H2SO3, has a pungent burning sulfur odor. It also produces trace amounts of toxic sulfur dioxide, SO2. When performing this experiment in person using H2SO3, all work must be conducted inside a fume hood — a ventilation device that draws harmful and/or malodorous vapors away from the user and protects against accidental exposure.