Chemistry solids and liquids

Chemistry solids and liquids - #61 Notes Unit 8:...

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chemistrynoteslecture.com LLC © 2011 #61 Notes Unit 8: Solids/Liquids Ch. Solids/Liquids ** Type of Solid Type of Bonding Properties Examples (compound) (Interparticle Force) ____________ ________ Ionic Ionic -hard NaCl, CaF 2 -high melting pts. Molecular Covalent: -soft -low melting points Polar: H-Bonding →→→→→→→→→→→→→ H 2 O Dipole-Dipole →→→→→→→→→→→→→ PCl 3 Nonpolar: London Dispersion Forces (LDF) →→→→→→→ CO 2 **Leave room to continue table in a few days!! I. Ionic Solids -are made of ions {(+) and (-)} and held together by electrostatic attraction. -stable, high melting, but dissolve in polar substances, like H 2 O. 3 Types of Closest Packed Structures Trigonal Holes (space between 3 atoms) The smaller (+) ions would fit around the larger (-) ions in the trigonal hole. Na + (small) and Cl - (large) Tetrahedral Holes (space between 4 atoms) Octahedral Holes (space between 6 atoms) trigonal holes << tetrahedral holes << octahedral holes (smallest) (largest)
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chemistrynoteslecture.com LLC © 2011 II. Molecular Solids -are covalently bonded. (nonmetals with nonmetals or “H” ) Van der Waals Forces: -are forces between molecules ( Inter molecular forces). { Intra molecular forces are bonds within a single molecule.} A) Dipole-Dipole Forces: -are between 2 polar molecules Dipole-dipole force = the δ(+) end of one molecule is attracted to the δ( -) end of another molecule. Hydrogen Bonding (** A special type of dipole/dipole force): This occurs in molecules when a “H” is bonded to a highly electronegative atom (N, O, F). The hydrogen bond is between the “H” in one molecule and the N, O, or F in
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This note was uploaded on 09/04/2011 for the course CHM 2046 taught by Professor Haces during the Spring '11 term at FAU.

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Chemistry solids and liquids - #61 Notes Unit 8:...

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