Chemistry Commons^™

Potentiometric Titrations Of Metal Ions With Edta, Donald Theodore Carlson

Honors Theses

Ethylenediaminetetracetic acid, known commonly as EDTA and commercially as Versene, Trilon B, Sequestrene, and Complexone II, III, and IV; was first produced in 1936 by the I.G. Farbenindustrie. EDTA reacts chemically as a ligand. That is, it forms a complex by occupying two or more coordination prositions of the atom it reacts with. The resulting complex is called a chelate, which stems from the Greek word for clas. EDTA acts as a sequestering agent by forming stable, water-soluble chelates with metal ions.

The Determination Of The Cross-Sectional Area Of A Stearic Acid Molecule, Michael Stacey Dryer

Honors Theses

The fundamental relationship determining the area per molecule is: A = SM/ (g/c x v x N) A = area per molecule. S = area occupied by the monolayer. M = molecular weight. g = grams of stearic acid in volume c. c = volume of solution. v = aliquot of c delivered to the surface. N = Avogadro’s Number. Each of the terms in the above equation will be discussed in detail below.

Further Studies On Zirconia Gels, James Emmons Anderson

Honors Theses

When solutions of zirconium oxychloride and sodium acetate are mixed at room temperature (25°c.), a grey-white hydrogel of zirconia is formed. This gel structure gradually weakens on standing, and finally becomes a water-clear sol. Heating this sol to 6o°c. will form a similar gel, stable at this temperature, which will reliquefy on cooling to 25°c. The gelation-reliquefaction cycle can apparently be carried out indefinitely. Such behavior is in direct contrast to normal gelation. The so-called “irreversible gels”, such as those of silicic acid, show stability at all temperatures; while other “reversible gels”, such as common gelatin, set at lower temperatures …

Liquid-Vapor Equilibria In The System: Isopropyl Alcohol-Dibromomethane, John Henry Nickles

Honors Theses

The purpose of this research project was to determine more closely the liquid vapor equilibrium curve and the boiling point and composition of the azeotrope formed in the system isopropyl alcohol - dibromomethane. This system is reported in Horsley's book from Lecat as forming an azeotrope at a bioling point less than 81.0 degrees Celsius. Both components have boiling points of less than 100 degrees Celsius and their refractive indices are well separated, thus making investigation with fairly simple, but accurate apparatus possible.

The Alkylation Of Phenol, William Raymond Stine

Honors Theses

Attention was focused on the formation of the various isomers of butyl phenol.

Investigations For A Rapid Qualitative Method For The Detection Of Organic Herbicides, Robert Albert Jung

Honors Theses

The present study is undertaken in an attempt to find a rapid qualitative or semi-quantitative method for the detection of organic herbicides in water.

Voltammetry With A Mercury Pool Cathode, David Peter Stricos

Honors Theses

Voltarnmetry with a mercury pool cathode has been examined using both slow and rapid scanning techniques. A conventional polarograph was used to interpret the slow scans, and a cathode ray polarograph for the rapid scans. A description of the necessary apparatus is given as well as the experimental details involved.

Three different supporting media were studied: 0.01 molar potassium nitrate, 0.1 molar potassium acid phthalate, and 0.1 molar ammonia-0.1 molar ammonium chloride. Well defined peaks were observed for lead, cadmium, and zinc in potassium nitrate. Indium also gave a peak, but it was not characteristic of a three-electron reduction. Furthermore, …

Determination Of Arsenic In Fish By Neutron Activation Analysis, William Walter Ullmann

Honors Theses

The use of arsenicals to control aquatic vegetation has become widespread. A study was conducted to determine possible uptake of arsenic by fish in treated waters. Present methods for the analysis of arsenic (1,2) are reliable when applied to water and bottom samples which contain relatively small concentrations of organic matter. In the presence of larger concentrations, arsenic is lost during digestion. Recoveries of from 40-60 per cent were obtained when the method for the analysis of arsenic in food (2) was applied to fish flesh.