CHM 2353 Study Guide - Midterm Guide: Azimuthal Quantum Number, Effective Nuclear Charge, Tricalcium Phosphate
Document Summary
Natural resources contain elements elements extracted and purified chemical process used to convert extracted elements into desired chemical compounds. Minerals: solid inorganic substances found in nature with a specific chemical composition and characteristic crystalline structure. Ore: a mineral or rock that contains an element in sufficiently high concentration to be an economically feasible source of that element. Minerals to metal: crush the ore comminution (particle size reduction), sizing (separate particles by size, concentrate the ore (cid:396)e(cid:373)o(cid:448)e (cid:862)gangue(cid:863) (cid:894)(cid:396)o(cid:272)ks, di(cid:396)t(cid:895, chemical reduction convert higher oxidation state metal compound to elemental metal, purify metal. Froth floatation: exploits hydrophobicity difference between valuable minerals and waste gangue (use surfactants to maximize differences: grind ore-containing mixture to powder, mix with water, oil, surfactants; beat into froth, ore is concentrated in the froth: skim off. Water separation: ore heavier than gangue: pass crushed ore down inclined water trough, water washes away lighter gangue, leaves ore behind.
