Ch 13 - Chem 1035 Chapter 13 1 of 35 Chem 1035 Chapter 13 3 of 35 Chapter 13 The Properties of Mixtures Solutions Homogeneous(all one phase mixture

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Chem 1035 Chapter 13 1 of 35 Chapter 13 The Properties of Mixtures Solutions: Homogeneous (all one phase) mixture or 2 or more components Variable composition Can be separated into individual components by physical means since the components maintain their identities Solvent: the substance that does the dissolving. Usually present in the larger amount Solute: The substance(s) being dissolved Chem 1035 Chapter 13 2 of 35 Soluble vs. Insoluble Miscible vs. Immiscible Intermolecular Forces and Solubility What kinds of substances are soluble/miscible? What kinds are insoluble/immiscible? To make a solution: “Like dissolves like” Chem 1035 Chapter 13 3 of 35 1. Ionic solute/polar solvent : O Na + Cl - Na + Cl - O -------H H Cl - Na + Cl - Na + + H H Na + Cl - Na + Cl - Solute Solvent Solution Forces: H: 2. Polar solute/polar solvent: O H-Cl----H-Cl + O -------H H H H Solute Solvent Solution Forces: H: Chem 1035 Chapter 13 4 of 35 3. Nonpolar solute/polar solvent: I 2 -------I 2 + O O -------H H H H Solute Solvent Solution Forces: H: 4. Nonpolar solute/nonpolar solvent: I 2 --------I 2 + CCl 4 ----------CCl 4 Solute Solvent Solution Forces: H: rinted with FinePrint - purchase at www.fineprint.com
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Chem 1035 Chapter 13 5 of 35 Example Problem : a. Are CH 3 OH and H 2 O miscible? Why or why not? b. Are CH 3 (CH 2 ) 9 OH and H 2 O miscible? Why or why not? Chem 1035 Chapter 13 6 of 35 H 3 C H 2 C C H 2 H 2 C C H 2 H 2 C C H 2 H 2 C C H 2 H 2 C C H 2 H 2 C C H 2 H 2 C C H 2 H 2 C C O O Na Hydrophobic: Hydrophilic: Soaps: Chem 1035 Chapter 13 7 of 35 Chem 1035 Chapter 13 8 of 35 The Solution Process Heat of Solution ( H soln ): the enthalpy change that occurs when a solution forms from solute and solvent. Lattice energy ( H lattice ): the enthalpy change that accompanies a solid ionic compound forming separate gaseous ions.
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This note was uploaded on 09/16/2008 for the course CHEM 1036 taught by Professor Amateis during the Spring '08 term at Virginia Tech.

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Ch 13 - Chem 1035 Chapter 13 1 of 35 Chem 1035 Chapter 13 3 of 35 Chapter 13 The Properties of Mixtures Solutions Homogeneous(all one phase mixture

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