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CHEM EXAM 1

Terms from chapters 11.1-2

QuestionAnswer
intermolecular forces the forces that exist between covalent molecules. Differences in molecular shape and polarity lead to different forces of attraction between molecules
dipole dipole interaction the molecules of that compound tend to “stick” together due to the attraction of the positive and negative poles
hydrogen bonding Hydrogen bonds are a special type of dipole–dipole interaction that occur only between molecules containing H─F, H─O, or H─N bonds.
London dispersion forces molecules with no overall dipole exhibit a weak attraction for each other
instantaneous dipoles shared evenly between two atoms, electrons are constantly moving. This motion produces slight, fleeting areas of positive and negative charges called
intermolecular forces: weakest to strongest London dispersion, dipole dipole, hydrogen bonding
draw lewis structures, find polar bonds: H2, HBr, PCl3, SF2, H2CCH2, HNNH, H2CNH, NO–, N2, CO, CN– draw the stuctures, check link for correct answers:
dissociation when an ionic compound dissolves in water, the ions are pulled apart by the water molecules
ion-dipole interaction ions experience a force of attraction for the polar water molecules. The electrostatic interaction between an ion and a polar molecule
miscible When substances can mix to form a solution,
immiscible when substances don't mix
General rule of polar and non polar components mixing like dissolves like
micelle When this compound is mixed with water, the anions form a spherical assembly
Identify the unbranched alkane that has the weakest dispersion forces: CH3 CH3 CH3 CH2 CH2 CH3 CH3 CH2 CH2 CH2 CH3 CH3 CH3
Identify the molecule that has dipole-dipole attractions between identical molecules: HCN, CH4, KBr, CCI4 HCN
Created by: user-1972151
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