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Full-Text Articles in Physical Sciences and Mathematics
A Study Of The Effect Of Certain Variables On The Titration Of Silicic Acid, James S. Walker
A Study Of The Effect Of Certain Variables On The Titration Of Silicic Acid, James S. Walker
Honors Theses
If a solution of sodium silicate is titrated with a strong acid, using methyl orange as an indicator, a very different end point is obtained from that obtained using phenolphthalein as an indicator. This difference is well established as being due to the ionization of silicic acid, either acidically or basically after the soda in the silicate has been neutralized by the strong acid. It was the intention of the experimenter to study this acid from the standpoint of the effect of certain variables, in the titration of sodium silicate with a strong acid, on the end points obtained.
The Preparation Of Symnetrical Tri Aryl Phosphines, George Brandes
The Preparation Of Symnetrical Tri Aryl Phosphines, George Brandes
Honors Theses
The purpose of this research project was the preparation of pure, symmetrical aromatic phosphines. These were to be used in dipole moment measurements for the calculation of the spatial arrangement of the carbon-phosphorus valence bond in the phosphines.
Concerning The Volume Change Resulting From The Sol-Gel Transformation Of Silicic Acid, Joseph Berg
Concerning The Volume Change Resulting From The Sol-Gel Transformation Of Silicic Acid, Joseph Berg
Honors Theses
The subject matter of this thesis is concerned with a study of the volume change observed during the period of transition, from the sol to the gel state, of silicic acid.
The Reaction Of Diphenyl Cadium With Phosphorus Trichloride, Alfred Henry Case
The Reaction Of Diphenyl Cadium With Phosphorus Trichloride, Alfred Henry Case
Honors Theses
Any study of the stereochemistry of tricovalent atoms would necessarily involve members of the third and fifth periodic groups. Tertiary phosphines with heavy groups would be most valuable for this work since phosphorus seems to be better suited to exhibit asymmetry than any other element of the fifth group. (24) It is believed that the heavy groups would slow down the oscillations of the phosphorus atom and make possible the resolution of the optical isomers. The purpose of this investigation was a further study of this possibility, particularly the reaction of organo-cadmium compounds with phosphorus trichloride. In this case two …
A Study Of The Physical Properties Of Dibromdinitromethane And Its Reaction In Liquid Ammonia, Quintin Perry Cole
A Study Of The Physical Properties Of Dibromdinitromethane And Its Reaction In Liquid Ammonia, Quintin Perry Cole
Honors Theses
Although there are at least half a dozen methods of preparing dibromdinitromethane given in the literature (1), the only physical properties mentioned are freezing and boiling points. Hence, after making the compound in order to study its reaction in liquid ammonia, data was obtained on other physical characteristic.
Setting Of Silicic Acid Gels In An Alkaline Medium, Frank James Alois
Setting Of Silicic Acid Gels In An Alkaline Medium, Frank James Alois
Honors Theses
As this piece of research essentially is a check Pomatti’s (1) only half as many points were taken. The time of set of silicic acid gels was carefully taken as the alkalinity of the medium was allowed to increase while the total volume of the gel was maintained constant. The runs were taken at three different temperatures so that temperature effects could be observed. Naturally enough, the pH’s of the gels were taken to place this work on quantitative basis. All pH measurements were accomplished by means of the colorimetric method which was first employed by Pomatti.
Transmission And Scattering Of Light By Silicic Acid Gel-Forming Mixtures, Warren De Sorbo
Transmission And Scattering Of Light By Silicic Acid Gel-Forming Mixtures, Warren De Sorbo
Honors Theses
In this investigation the transmission and scattering of light by the silicic acid gel forming mixtures have been studies during the process of gel formation in an effort to extend the work already done in this laboratory on the structure of silicic acid gels. The intensity of the transmitted and scattered light had been measured in terms of galvanometer deflections using a photoelectric tube circuit. An attempt had been made to utilize these results in elucidating the changes in size and number of the colloidal particles which take place in gel formation.
Co-Precipitation Of Manganese With Calcium Phosphate, Joseph Francis Collins
Co-Precipitation Of Manganese With Calcium Phosphate, Joseph Francis Collins
Honors Theses
This investigation was undertaken to study, in a preliminary way, the effect of precipitating tricalcium phosphate in the presence of manganous salts. Certain facts in relation to manganese deficiency in the diet of fowls, giving rise to perosis, makes the problem of interest in view of the work carried out at the Agricultural Experiment Station at Colorado State College. (3). It has been known for a long time that a diet high in calcium produces perosis which can be corrected by peritoneal injection of manganese. (1). C. D. Caskey and L. C. Norris (2) have found that in the presence …
A Study Of The Formation Of Gels Of Hydrated Zirconia, Walter Addison Fallon
A Study Of The Formation Of Gels Of Hydrated Zirconia, Walter Addison Fallon
Honors Theses
As silica gels and titania gels have been prepared and studied, it seemed logical that this investigation could be extended to zirconia gels. It has been the purpose of this research to determine the conditions necessary for the formation of zirconia gels and to initiate the investigation of their characteristics.
The Effect Of Silicia Concentration On The Time Of Set Of Constant Ph, Walter Otto Gerber
The Effect Of Silicia Concentration On The Time Of Set Of Constant Ph, Walter Otto Gerber
Honors Theses
When an aqueous solution of sodium silicate is treated with an acid, the mixture will become increasingly viscous and opalescent, and will finally set, it the silica concentration exceeds 2% and if the gel is not too acid or too alkaline. The time of set is determined by the pH, concentration of silica, concentration of certain foreign substances and the temperature.
The Viscosity Of Silicic Acid Gels, William George Gormley
The Viscosity Of Silicic Acid Gels, William George Gormley
Honors Theses
Gelation is that phenomenon in which the entire system of both dispersion medium and dispersed substances solidify into an apparently homogeneous, solid mass. Upon the assumption that a jelly consists of myriads of hydrous particles that have become enmeshed into a network that entrains liquids, it follows that any substance should form a jelly when a suitable amount of a highly dispersed substance is precipitated provided that the particles absorb the dispersing medium very strongly. The process of gelation differs macroscopically from flocculation in that flocculation presents a separation of the dispersed substance. It has been proposed that gelation is …
Elasticity Of Silicic Acid Gel, Frederick Searles Clum
Elasticity Of Silicic Acid Gel, Frederick Searles Clum
Honors Theses
When Robert Hooke published the “Description of Heliscopen” in 1676 the quotation above appeared on page 31 – translated – “The power of any spring is in the same proportion with the tension therein.” He formulated his theory from experimental results. It remained for Young, nearly a century and a half later, to interpret Hooke’s results in the generalized sense known today. Young defined the modulus, now known by his name, as the ratio of the force, causing elongation or compression, over the increment of expansion or contraction produced by it. When a proportion of matter is under the influence …
The Thermal Dissociation Of Barium Hydride, Edward Rynex Kane
The Thermal Dissociation Of Barium Hydride, Edward Rynex Kane
Honors Theses
For the past fifteen years rather extensive investigations have been carried on in this laboratory concerning the thermal dissociation of the hydrides of the alkaline earth metals. During this oeruid considerable time has been spent in devising suitable apparatus for the work and improved methods of procedure. Each successive worker on the problem in this laboratory has contributed materially to some phase of the investigations, or at least suggested from his experience improvements to be made in existing methods.It is however, unfortuneate that, because of the nature of the course in which these investigations have been undertaken, time for research …
Dialysis Of Silicic Acid, Paul L. Merz
Dialysis Of Silicic Acid, Paul L. Merz
Honors Theses
This research was a quantative study of the polymerization of silicic acid molecules which occurred during the process of gel formation by the means of dialysis. The condensation of the silicic acid molecules, Si(OH)4, to form larger molecules of colloidal size, as suggested by the polysilicic acid fibriller theory, was investigated with membrances of known pore size at various stages of the reaction. Although filter and membrane action is only to a limited extent comparable with the action of a sieve, and is much more dependent on the absorption in the capillaries than the size of the pores, still a …
A Study Of Electromotive Force Over A Concentration Gradient, Sherman William Parry
A Study Of Electromotive Force Over A Concentration Gradient, Sherman William Parry
Honors Theses
The problem was entered into to find out whether a gradual change of concentration over a distance of some centimeters would make any change in the electromotive force if substituted for a relatively sharp junction.
A Study Of The Physical Properties Of Bromopicrin And A Preliminary Investigation Of Its Reaction In Liquid Ammonia, George Bailey Stone
A Study Of The Physical Properties Of Bromopicrin And A Preliminary Investigation Of Its Reaction In Liquid Ammonia, George Bailey Stone
Honors Theses
The density and the index of refraction of bromopicrin were verified. New values were determined for the vapor pressure and the melting point. The surface tension and the viscosity were measured for the first time.
Prevention Of Bleeding By Coating Of The Pigment Particles, Angelo James Sederis
Prevention Of Bleeding By Coating Of The Pigment Particles, Angelo James Sederis
Honors Theses
The problem, essentially, is to conceive of a treatment which such a pigment could be given that will render it insoluble in those mediums in which it bleeds, without changing its characteristics in some other respect or making it so costly to manufacture that it would be impractical.
A Study Of The Electrical Conductivity Of Glass, Raymond William Barclay
A Study Of The Electrical Conductivity Of Glass, Raymond William Barclay
Honors Theses
In past years, research has been done at Union College and other places on the electrical conductivity of glass. However, there seems to be a need of more quantitative work done on the subject. The purpose of this research is to give a deeper insight into the process; in particular, to investigate how the conductivity is affected by the replacement of sodium ions of the glass by various other ions.