The Conditions of Formation of Certain Double Sulphates

Johnston, William (1929) The Conditions of Formation of Certain Double Sulphates. PhD thesis, University of Glasgow.

Abstract

A mimber of systems of the type, bivalent metallic sulphate-alkali sulphate-water, have been Investigated at various temperatures, and from the results conclusions regarding the conditions of formation of the corresponding double sulphates are drawn. Evidence is also adduced for the existence of complex ions in solution. Three alkali sulphates were chosen: potassium sulphate, ammonium sulphate, and sodium sulphate. It was expected that a study of the double sulphates of these compounds would prove of particular interest, especially in view of the following facts. Potassium may be regarded as a typical alkali metal. Ammonium is of peculiar interest as regards its remarkable position in the series of alkali metals. Sodium is noteworthy when the anomalous properties of its compounds are taken into consideration.. Various bivalent metallic sulphates have been investi­gated with each of the alkali sulphates, and by this means, and by reference to the work of other investigators, not only have the alkali sulphates been compared as regards the formation of double salts, but some light has been thrown on the specific influence of the different bivalent metallic sulphates.. These double salts have also been studied from the general point of view of range of formation as regards change in temperature and relative concentration of the constituent salts, and also from the point of view of isothermal evaporation. The following potassium systems have been studied Potassium sulphate-nickel sulphate - water at 0 and 25°C. Potassium sulphate-cobalt sulpnate-water at 25°C. Potassium sulphate-zinc sulphate-water at 25°C. Potassium sulphate-manganese sulphate-water at 0°and 25°C. Ammonium system Ammonium sulphate-manganese sulphate-water at 0°C. Sodium systems Sodium sulphate-copper sulphate-water at 0°, 25°, and 37.5°C, Sodium sulphate - zinc sulpnate-water at 0°and 25°C. Sodium sulphate-manganese sulphate-water at 0°, 25°, and 35 °C. As a result of these investigations it has been shown that manganese potassium sulphate is tetranydrated, and that manganese sodium sulphate is dihydrated..

• Item Type: Thesis (PhD)
• Qualification Level: Doctoral
• Keywords: Inorganic chemistry
• Date of Award: 1929
• Depositing User: Enlighten Team
• Unique ID: glathesis:1929-80629
• Copyright: Copyright of this thesis is held by the author.
• Date Deposited: 30 Jan 2024 14:44
• Last Modified: 30 Jan 2024 14:44
• URI: https://theses.gla.ac.uk/id/eprint/80629