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The boiling point of sodium sulfate is a chemical property. Sodium sulfate is an inorganic compound with the formula Na2SO4. It also occurs naturally as the mineral mirabilite and its decahydrate, Thenardite. It is a common chemical salt with many industrial uses. About half of the world’s production is from the natural mineral form, and the other half is from chemical processes.
When heated above its boiling point, Na2SO4 will vaporize. This will form a white cloud of fine granules or powder that is readily soluble in water. This solution has an odorless, cool, and slightly bitter taste. It has a high solubility in water and is readily absorbed by moist air. Sodium sulfate is used to dry organic liquids, in the manufacture of powdered home laundry detergents and as an inert drying agent for organic solutions in laboratory use. It is also used as a mordant in the printing and dyeing industry, for quantitative determination of nitrogen in paper pulp, to prevent corrosion of metals and in some food processing applications.
To determine the boiling point of sodium sulfate, place a capillary tube sealed at one end in the inflammable liquid and connect the other end to the bulb of a thermometer. Then heat gently the solution with an electric hot plate until bubbles begin to rise from the tube. When the steady stream of bubbles stops, read the temperature. The actual boiling point elevation will be lower than the expected value because of ion pairing that takes place in nonideal solutions.