Relative molecular mass of sodium sulfate: 142.04.
Sodium sulfate (Na2SO4) is a salt produced by the combination of sulfate and sodium ions. Sodium sulfate is soluble in water and its aqueous solution is weakly alkaline, soluble in glycerol but insoluble in ethanol.
Inorganic compounds, sodium sulfate decahydrate is also known as manganese, high purity, fine particles of anhydrous material known as metamorphic powder, exposed to the air is easy to absorb water to generate sodium sulfate decahydrate, sodium sulfate decahydrate is commonly known as manganese.
Mainly used in the manufacture of water glass, glass, porcelain enamel, paper pulp, cooling mixture, detergent, desiccant, dye diluent, analytical chemical reagents, pharmaceuticals, feed, etc.?
At 241°C sodium sulfate transforms into hexagonal crystals. In the organic synthesis laboratory sodium sulfate is one of the most commonly used post-processing desiccant.
Expanded Information:
1, beach field method
The use of nature in different seasons of temperature changes in the raw material liquid evaporation of water, the crude manganese nitrate will be crystallized out. Summer will contain sodium chloride, sodium sulfate, magnesium sulfate, magnesium chloride and other components of the brackish water into the beach field, evaporation by sunlight, precipitation of crude manganese nitrate in winter. This method is the main method from natural resources to put forward manganese nitrate, the process is simple, low energy consumption, but the operating conditions are poor, the product is easy to mix with mud and sand and other impurities.
2, mechanical freezing method
The use of mechanical equipment will be heated raw liquid evaporation frozen to -5 ~ -10 ℃ when the precipitation of nitrous oxide. Compared with the beach field method, this method is not affected by the season and natural conditions. Product quality is good, but energy consumption is high.
3, the comprehensive utilization of salt lake method
Mainly used for sulfate-carbonate type salt water containing a variety of components. In the extraction of a variety of useful components at the same time, the separation of crude manganese nitrate. For example, the processing of salt lake water containing sodium carbonate, sodium sulfate, sodium chloride, boride and potassium, bromine, lithium, can be carbonized salt lake brine, so that sodium carbonate into sodium bicarbonate crystallized out;
Cooling mother liquor to 5 ~ 15 ℃, so that borax crystallized out; separation of borax after the secondary mother liquor frozen to 0 ~ 5 ℃, precipitation of nitrous oxide.
Reference:Baidu Encyclopedia---Sodium Sulfate