Welcome to 3.091Lecture 25

November 10, 2004

topical coverage for Test 3

types of solutions solute solvent example solid liquid brine (NaCl H2O) liquid liquid wine (EtOH H2O) gas liquid seltzer (CO2 H2O) gas gas air (O2, Ar, CO2... N2) solid solid metal alloy (C Fe) doped semiconductor ( B Si) stabilized ceramic (CaO ZrO2) modified glass (Na2O SiO2) liquid solid amalgam (Hg Ag) gas solid intercalation (H2 LaNi5)

classify liquid mixtures by particle size

φ (nm) example light filter sepn

solution < 2 brine + – –

*colloid 2↔1000 milk ± ± – suspension >1000 blood – + +