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Full-Text Articles in Physical Sciences and Mathematics
Effect Of Salts On The Setting Time Of Silicic Acid Gels, Gustav F. Hallstrom
Effect Of Salts On The Setting Time Of Silicic Acid Gels, Gustav F. Hallstrom
Honors Theses
It has been stated by Prasad and Hattiangadi (1) that the process of setting of mixtures of solutions of sodium silicate and acetic acid consists of three stages: (a) The formation of silicic acid by the interaction of the acid with sodium silicate (b) The formation of the colloidal solution of silicic acid (c) The coagulation of the colloidal solution by the electrolytes liberated in the first reaction The present investigation was undertaken with a view to examine the effect produced on the time of setting of the silicic acid gels by the addition of extra quantities of electrolytes to …
Influence Of Temperature And Acid On Time And Set Of Silicic Acid Gels, Kenneth Jacob Frederick
Influence Of Temperature And Acid On Time And Set Of Silicic Acid Gels, Kenneth Jacob Frederick
Honors Theses
The underlying purpose of this research was to gain a further insight into the mechanism of the setting of silicic acid gels. The primary purpose, however, was to study the effect upon the heat of activation of the substitution of the weak acids, heretofore used almost entirely in the work done at Union College on these gels, by certain strong acids. The acids employed in this research were hydrochloric, nitric and sulphuric. Several gels were prepared from a standard silicate solution and each of these acids. Measurements of the time of set and pH were taken for each gel. Four …
Heats Of Solution In Liquid Ammonia, Herman Dettbarn Kluge
Heats Of Solution In Liquid Ammonia, Herman Dettbarn Kluge
Honors Theses
Liquid ammonia in many of its reactions and properties stimulates water. Next to water liquid ammonia is the best known electrolytic solvent. It dissolves a large number of salts to form, in general, conducting solutions, in which the ions are more mobile. Dilution Curve. The heat of dilutes is plotted against the change in the moles of ammonia. The curves approach a constant value which is the heat of dilution. These curves were plotted to compare the heat of dilution of ammonia chloride and ammonium bromide.
Time Of Set Of Silicic Acid Gels, Michael Priznar
Time Of Set Of Silicic Acid Gels, Michael Priznar
Honors Theses
The purpose of this work is to study the time of set of silicic acid gels as a function of the temperature. All data are confined entirely to acid gels made by mixing sodium silicate and an acid.
Change Of Conductivity Of Silicic Acid Gels Upon Setting, Robert E. Russell
Change Of Conductivity Of Silicic Acid Gels Upon Setting, Robert E. Russell
Honors Theses
During the studies made on the structure of silicic acid gels, several theories of gel formation have been proposed. The theory at present under consideration has to do with the polymerization of the molecule H2SiO3 into some of structure, most probably due to the splitting out of water molecules as is indicated.