Lec-03-Chap-01-2 - CHE 131 Lecture 03, 1/27/2006 Matter and...

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CHE 131 Lecture 03, 1/27/2006 1 Matter and the Atomic Theory Lecture three (Chapter one) Benjamin S. Hsiao Department of Chemistry Stony Brook University Pure Substances Elements Compounds Mixtures two or more pure substances Heterogeneous • uneven texture Homogeneous (Solution) • sample uniform throughout Scheme for the Classification of Matter
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CHE 131 Lecture 03, 1/27/2006 2 Physical Changes • changes in physical properties of substances Physical States • solid – fixed volume and shape • liquid – fixed volume – shape of container, horizontal top surface •g a s – takes shape and volume of container Separation of Mixtures • Filtration • Distillation • Chromatography Filtration • separate solids by differences in melting points • separate solids by differences in solubility (fractional crystallization)
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CHE 131 Lecture 03, 1/27/2006 3 Distillation • separation by differences in boiling point (fractional distillation) – distillate – distillation • fractionating column - part of apparatus where separation occurs Chromatography • liquid-column • paper • thin-layer (TLC) •g a s •HPLC
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This note was uploaded on 09/04/2009 for the course CHE 81914-01 taught by Professor Prof.benjaminhsiao during the Spring '06 term at SUNY Stony Brook.

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Lec-03-Chap-01-2 - CHE 131 Lecture 03, 1/27/2006 Matter and...

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