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Cesium sulfate is very soluble in water and slightly soluble in ethanol, acetone and pyridine. It is used to prepare dense aqueous solutions for use in equilibrium density gradient centrifugation, one of the most useful tools for fractionation and characterization of macromolecules such as DNA. Also used in the preparation of crystals. It is also employed as a catalyst together with vanadium or vanadium pentoxide for oxidation of sulfur dioxide in abiabatic multibed reactors.
The solubility of a solid material in a solvent at a specific temperature is determined by plotting the mass of the solute/100g of water on a solubility graph. Solubility decreases as temperature increases, although there are some exceptions to this rule. For example, table salt (sodium chloride) dissolves to the extent of 36g in 100g of water at 25C and there is little change as temperature increases.
A good way to understand this is to look at a solubility graph and answer some questions. For instance, you can determine the solubility of a particular solution by looking at the graph and finding the point on the curve where the green line crosses it. You can also calculate the molar solubility of a solid by drawing a line up from 30C to the NaNO3 line and then carrying it over until you hit the 60C mark. This will give you the solubility of 60g of NaNO3 in 250g of water at 60C. The solubility of a solid in an aqueous solution is a function of its solubility product constant
