CHM135H1 Chapter Notes - Chapter 12: Intermolecular Force, Colligative Properties, Molality
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CHM135H1 Full Course Notes
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Mixture: any combination of two or more pure substances blended together in some arbitrary proportion without chemically changing the individual substances themselves. Heterogeneous: mixing visually nonuniform, has regions of different composition. Homogeneous: mixing uniform to naked eye, has constant composition throughout. Solutions: most common, contain particles with diameters in range of 0. 1-2nm, transparent, don"t separate on standing. Colloids: contain larger particles with diameters in range of 2-500nm, murky or opaque to light, don"t separate on standing. Suspensions: mixtures having even larger particles than colloids. Not truly homogeneous because particles separate on standing. Any one state of matter can form a solution with any other state. Dissolved substance is called solute and liquid is called solvent. All intermolecular forces are important for explaining the properties of solutions. 3 types of interactions among particles: solvent-solvent, solvent-solute, solute-solute. Like dissolves like , solutions form when interactions similar in kind and magnitude.
