Potentiometric Titrations with Ceric Sulphate: A Thesis
Author
Burton, Joseph Ashby
Subject
Potentiometry
Sulfates
Cerium compounds
Metadata
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The title page indicates that this thesis was submitted "in partial fulfillment of the requirements for the degree of Bachelor of Science in Chemistry." These investigations indicate that ceric sulphate is an excedingly versatile oxidizing agent useful in many laboratory procedures. It has been found particularly valuable for the determination of reducing agents in the presence of high concentrations of HCl, where a similar use of potassium permanganate is impossible. In addiition to the potentiometric method of determining the end-point, the Walden indicator, o-phenanthroline ferrous complex, has been used with great satisfaction. The stability of standard ceric sulphate solutions has been proven over a nice range of H2SO4 concentrations, (10 - 40 cc. conc. H2SO4 per liter), and at the present time they may be cheaply prepared, the cost ranging from 5 to 17 cents per liter of tenth normal solution, depending on the quality of the salt used. Since, as the above summary shows, ceric sulphate does have definite possibilities as a standard oxidizing agent, the following investigation was attempted wiith
two objects in view: First, to conduct preliminary investigation of the use of ceric sulphate solutiions in some potentiometric laboratory oxidation procedures. Second, to conduct a more extensive study of tne oxidation by ceric sulphate of bivalent platinurn. [From introductory section]