Summary: Because of its wide availability, NaCl is the starting material for many inorganic chemicals. In this program, salt is seen being pumped to the surface from deposits of 1011 tons in salt fields as a brine solution, and into a chemical plant where chlorine and sodium hydroxide are produced by electrolysis. Three types of cells used to separate the products at the anode and cathode-mercury...
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2007
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Summary: This program traces the water cycle, beginning with the collection of rainwater in rivers and lakes, in great detail through a water treatment plant, to some of the places where water is used, and finally back into the atmosphere. Treatment of the water begins with the use of chlorine to destroy organisms; the water is then filtered through various sedimentation tanks to remove solid matter....
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2007
View online at AVOD
Summary: Major research has been devoted to making the processes of coal combustion more efficient and reducing the pollution they cause. Coke, the first smokeless fuel made from coal, has important industrial uses which depend on the grade and strength of the coke. Coke can be carbonized to remove volatile matter which is in turn processed to provide a wide range of industrial materials: pitch,...
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2007
View online at AVOD
Summary: A second product made from sodium chloride, sodium metal, is also produced at the chemical plant shown in Chemicals from NaCl: 1. It is formed by electrolysis of a sodium chloride, calcium chloride molten mixture, and is isolated at the cathode of the cell as a liquid. This product is extremely reactive; it must be handled very carefully and packaged in an inert oil, free from air and moisture....
Format: software, multimedia
Publisher / Publication Date: Films Media Group 2007