CHEM 4025 Study Guide - Final Guide: Froth Flotation, Cuprite, Zincite
Document Summary
Chapter-06: general principles and processes of isolation of elements: minerals: The naturally occurring chemical substances in the earth"s crust which are obtained by mining are known as minerals: metals may or may not be extracted profitably from them, ores: The rocky materials which contain sufficient quantity of mineral so that the metal can be extracted profitably or economically are known as ores: gangue: Sodium metal: occurrence: rock salt (nacl), feldspar (na3alsi3o8, extraction method: electrolysis of fused nacl or nacl/ cacl2, inference: sodium is highly reactive and hence, it reacts with water. Copper metal: occurrence: copper pyrites (cufes2), malachite (cuco3. cu(oh)2), cuprite ( cu2o) Copper glance (cu2s: extraction method: roasting of sulphide partially and reduction. 2 cu2o + cu2s 6 cu +so2: inference: it is self-reduction in a specially designed converter. Zinc metal: occurrence: zinc blende or sphalerite (zns), zincite (zno), calamine (znco3, extraction method: roasting and then reduction with carbon, inference: the metal may be purified by fractional distillation.
