How to identify precipitated barium sulfate Can also be used for radiation protection wall materials, but also for porcelain, enamel and dyestuff industries, but also for the manufacture of other barium salt raw materials. And can be used in paint, ink, plastic, rubber and battery raw materials or fillers imprint paper and copper board paper surface coating agent sizing agent for textile industry Glass products as a clarifying agent, can play a role in defaming and increasing luster. Because of its high refractive index (1.63 / 1.65), the color is white and has a certain covering power. Precipitated barium sulfate mainly has the following products: Refined precipitated barium sulphate, Superfine precipitated barium sulphate and Modified precipitated barium sulphate.Precipitated barium sulfate has the appearance of white amorphous powder, the relative density is 4.50 (15 ℃), the melting point is 1 580 ℃. The benefits of precipitating barium sulfate
Barium, plastic grade precipitated barium sulfate, etc., which is relatively expensive compared to heavy barium. It is usually divided into coating grade precipitated sulfuric acid according to different applications. Precipitated barium sulfate is used as a filler in pharmaceuticals, high-grade coating inks, plastics, rubber, glass, ceramics, etc. The precipitated barium sulfate in the industry is mainly formed by reacting barium sulfate with sulfuric acid, reacting barium chloride with sulfuric acid or sodium sulfate, and reacting barium sulfide with sodium sulfate. It is not toxic by itself, but it can cause poisoning if it contains soluble hydra-zine. It is slightly soluble in water and insoluble in acid.
Barium sulfate precipitate color free#
It is made by artificial processing, and unlike the heavy sputum, the sputum is almost free of impurities. Precipitated barium sulfate, also known as industrial barium sulfate or sedimentation. Used as a filler in the coatings, plastics, and ink industries.Ģ. The impurities are more, the quality is mainly determined by the mine itself, but its price is low, usually applied in white pigment production or low-grade. It is made by the process of cleaning, grinding and drying after selecting natural barium sulfate. Heavy barium, also known as natural barium powder. The reserves and output of barium sulfate are the first in the world at present, which is a favorable condition for the development of barium sulfate products.Ĭhina's industrial barium sulfate mainly has the following types:ġ. QuestionĮxplain why, in a test for halide ions, dilute hydrochloric acid cannot be used to acidify the sample.The resources of barium sulfate in China are abundant, the total reserves of resources are more than 1 billion tons, and the grade of barium sulfate ore is relatively high. This removes them, so stopping them giving an incorrect positive result for chloride ions. The acid reacts with any carbonate ions present. ExampleĮxplain why, in a test for halide ions, the sample is acidified with dilute nitric acid first.Ĭarbonate ions also produce a white precipitate with silver nitrate solution. Observe and record the colour of any precipitate that forms. add a few drops of dilute silver nitrate solution.add a few drops of dilute nitric acid to the sample.
The table shows the colours of these silver halide precipitates. Silver ions react with halide ions (Cl -, Br - or I - ions) to form insoluble precipitates. These would react with barium ions in the test, giving an incorrect positive result. Sulfuric acid, H 2 SO 4 (aq), contains sulfate ions.
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