Chem 111- Unit 4
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| molecular polarity | a net imbalance of charge over an entire molecule
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| polarity depends on | bonds, shape, orientation
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| 6 intermolecular forces (strongest -> weakest) | 1) ion-dipole
2) H-bonds
3) Dipole-dipole
4) Ion-induced dipole
5) Dipole-induced dipole
6) Dispersion
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| Polarity and boiling point | As polarity increases, so does boiling (& melting) point
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| particle motion assumption (2) (kinetic molecular theory) | -constant, random, straight-line motion (until collision)
-distribution of speeds
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| particle collisions assumption (3) (kinetic molecular theory) | -collisions exchange kinetic energy
-total kinetic energy is constant (Ek)
-between collisions, molecules don't influence each other
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| particle volume assumption (3) (kinetic molecular theory) | -large collection of molecules
-particles have mass but no volume
-volume of gas=volume of container
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| at the temperature b/w substances... | Ek is constant
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| ___mm Hg (or torr) = 1 atm | 760
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| P is prop. to | (n)(T)/(V)
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| Dalton's law of partial pressures | in a mixture, the total pressure = sum of pressures of gases
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| exception to ideal gas law | at high pressure, IM forces lower the pressure
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| Molarity | Moles of solute/L solution
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| polarizability (pattern) | the more dispersion, the more susceptible an atom is to induced polarization (larger atoms)
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| does NOT change during reactions (3) | mass, #atoms, types of atoms,
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| DOES change during reactions (4) | types of molecules, # of bonds, total moles, pressure
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| electrolyte | charged particles that can move (& conduct electricity)
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| molecular speeds of heavier particles | steep graphs
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| during H-bonding, NOF need ____ | lone pairs!
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| polarizability (definition) | how easily an electron cloud can be distorted
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| dispersion force (definition) | the intermolecular force responsible for the condensed states of nonpolar substances
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| molecular speeds of lighter particles | long graphs
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