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  Item Reference: KCLCAL-1867-1868-275

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EVENING CLASSES 275 Silicon -Occurrence in Nature as Silicic Acid and Silicates -Soluble and insoluble Silica-Separation of substances by Dialysis Boron -Borax and Boracic Acid Nitrogen -Its chemical inactivity in the free state Ammonia -Its sources preparation and properties- Liquefaction of Gases-The Salts of Ammonia-Ammonium theory-Determination of Nitrogen in organic compounds- Deduction of empirical and rational formulae-Oxidation of Ammonia Compounds of Nitrogen and Oxygen -Nitric Acid- Manufacture from Saltpetre-Its oxidising properties- Action upon metals and organic substances-The Nitrates- Nitric Anhydride- Derivation of the other Oxides of Nitrogen from Nitric Acid-The Oxides of Nitrogen as illustrating com- bination in multiple proportions by weight and volume Chlorine -Extraction of Chlorine from Salt-Its great chemical activity-Application of Chlorine for Bleaching and Disinfecting Hydrochloric Acid -Its action upon Metals and their Oxides-Molecular types-Atomicity of the elements Compounds of Chlorine and Oxygen -Their oxidising properties-Chlorate of Potash Bromine -Its extraction from mineral waters Iodine -Preparation from Sea-weed Fluorine -Difficulty in isolating it-Hydrofluoric Acid its corrosive action upon glass Fluoride of Silicon- Gradational relations among elements illustrated by the group of elementary halogens Sulphur -Important metallic ores containing Sulphur- Refining of Sulphur Allotropic varieties-Sulphuretted Hydrogen-Its use in analysis
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