Lesson: Reduction–Oxidation Titrations

In this lesson, we will learn how to describe iodometry, iodimetry, and other redox titration methods and troubleshoot common errors.

Worksheet: 8 Questions

Q1:

Oxalic acid (HCO)224 and potassium permanganate (KMnO)4 react according to the shown net ionic equation. 2MnO()+5HCO()+6H()10CO()+2Mn()+8HO()4–224+22+2aqaqaqgaql

Titration of a 20.0 mL aqueous solution of oxalic acid required 23.24 mL of 0.09113 M aqueous potassium permanganate. Calculate, to 3 significant figures, the concentration of the oxalic acid solution.

Q2:

A 58.3 mg sample containing Sn2+ is dissolved in 1.0 M  HCl. If 23.6 mL of 0.010 M Tl3+ is required to reach the end point of the titration, what is the mass percent (w/w%) of tin in the original sample?

Q3:

A 0.357 g sample contains only lead(II) iodide and sodium iodide in 100 mL of distilled water. Titration to Fajans’s endpoint requires 22.37 mL of 0.050 M silver nitrate. What is the mass percent (w/w%) of lead(II) iodide in the sample?
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