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gen chem ii ch 12 and 13 burdge
ion ion dispersion and M, m, vapor pressure, etc
46
Chemistry
Undergraduate 2
10/05/2011

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Term
dipole-dipole interaction in regards to: dependance of the interaction energy on the 1. dipole moment 2.the distance seperating the ion and polar molecule
Definition
-exists between 2 polar molecules
-^ mu, ^ int energy
-v mu, v int energy
molecules dont have to be identical
-^ distance seperating polar molecules, v mag of inter energy
Term
ion-dipole interaction including the dependance of the interaction energy on the 1. magnitude of the ion charge 2. dipole moment 3.the distance seperating the ion and polar molecule
Definition
-exists between an ion and polar molecule
1. ^mag of ion charge/^mag. of inter. energy-also vice versa
2.^dipole moment, ^ mag of inter. energy and vice versa
3.distance sep. ion and polar molecules^, mag of inter energy v and vice versa
Term
hydrogen bond interaction
1.relationship to dipole dipole interaction
2.requirements of the molecules involved
Definition
1.unusually strong dipole dipole interaction
2.Molecule 1=contains H atom to a small electronegative element and Molecule 2=contains small electronegative element
Term
ion-induced dipole interaction
Definition
-interaction of a nonpolar molecule with an ion or polar(dipole>0) species
Term
what of a nonpolar species is thought to be symmetrical?
Definition
electron density
Term
an induced dipole moment is resulted from
Definition
an ion or a polar molecule approaching the electron could of the nonpolar species is distorted
Term
in the london interaction:
list size of electron compared to mag of int. energy
list number of interacting atoms compared to mag of int. energy
-and the distance of seperating species compared to mag of inter. energy
and mm compared w/ london forces
Definition
-^size of electron cloud ^mag of int. energy and vice versa
-^number of int. atoms ^mag of inter. energy and vice versa
-^distance of seperating species v mag of inter. energy
^ mm ^ london interaction energy
Term
order of interactions in terms of relative interaction energy from strong, to moderate, weak and weak, to very weak
Definition
ion-dipole;H-bond;ion-induced dipole;dipole induced dipole;london
Term
partial spacing and order of intermolecular interaction energy
Definition
spacing: gas-liquid-solid
order: solid-gas-liquid
Term
ion ion is a dominant interaction between...
Definition
two ionic species
Term
ion-dipole interaction dominant interaction between....
Definition
all ionic species and a polar molecule
Term
hydrogen bond and dipole dipole interactions have dominant interactions between....
Definition
two polar molecules
[h-bond>dipole dipole]
Term
london interactions dominant interactions between...
Definition
nonpolar molecules(all molecules)
Term
seven basica crystal systems:
Definition
cubic simple; tetragonal simple; orthorhombic simple; monoclinic simple; rhombohedral; hexagonal; triclinic
Term
solution
Definition
mixture of two or more substances
Term
a solution is aqueous when
Definition
the solvent is water
Term
solvent
Definition
produced in greater amount, what solute is dissolved in
Term
mass percent is written as:
Definition
%(w/w)
Term
mass percent is written as:
Definition
%(w/w)
Term
mass percent=
Definition
mass of substance/mass of sample * 100
Term
volume percent=
Definition
volume of substance/volume of sample * 100
Term
volume percent written as;
Definition
%(V/V)
Term
ppm,ppb,ppt
Definition
mass of substance/mass of sample *10^6, 10^9, 10^12
Term
solubility(of a solute)
Definition
max amount of solute that can be dissolved in a specified quantity of solvent as a constant temp and pressure and remain stable
Term
saturated solution
Definition
the max amount of solute to solvent ratio where under specific temp and pressure it is stable
Term
supersaturated solution
Definition
unstable solution in which contains more dissolved solute than a saturated solution at a given temp and pressure
Term
as temp increases so does solubility in:
as temp increases, solubility decreases in:
Definition
solid or liquid
and
gas
Term
henrys law
Definition
relates the partial pressure of a gas aboce a solution to the concentration of a gas in a solution
Term
henry's law is strictly true when-
Definition
the gas solute dissolves in the liquid solvent, but does not react with the solvent
and at low partial pressures and concentrations
Term
henry's law equation and explanations
Definition
C(gas)=kP(gas)
Cgas=concentration of dissolved gas in solution(mol frac. molarity)
Pgas=partial pressure of gas above solution
k=henry's law constant
Term
miscible
Definition
if one liquid dissolves in the other in all proportions without seperation
ex. alcohol and water
Term
immiscible
Definition
if two liquids cannot be mixed with all proportions without seperation
ex. oil/water
Term
3 steps describing dissolution
Definition
expand the solute:endothermic
expand the solvent:endothermic
intermolecular attractions develop:exothermic
Term
explain how "like dissolves like"
Definition
the more similar the intermolecular forces, the more likely the solute is going to dissolve into the solvent
Term
crystal lattice energy
Definition
energy absorbed when a mole of formula units of a solid is sperated into its constituent ions in the gas phase
Term
colligative property
Definition
a physical property of a solution which depends on a # of solute particles in a given amount of solvent, but not on the identity of the solute particles
Term
4 colligative properties:
Definition
vapor pressure, boiling pressure, freezing point depression,osmotic pressure
Term
difference in dissociation and ionization:
Definition
dissociation:process of a solid IONIC COMPOUND seperating into ions with dissolved into h2o
-ionization the process of a COVALENT COMPOUND seperating into ions when dissolved in h20
Term
difference in electrolyte and nonelectrolyte
Definition
electrolyte:dissolves in water 2 OR MORE particles result, produces ions when dissolved in water
non electrolyte:dissolves in water ONLY ONE partice results DOES NOT PRODUCE IONS WHEN DISSOLVED IN WATER
Term
vapor pressure lowering in colligative properties
Definition
a solution with a nonvolatile solute will have a lower VP than the pure solvent
Term
in Raoults law what is correlated in the plot graph?
Definition
vapor pressure of solvent will increase with the mole fraction of the solvent but the solute will go the opposite direction
Term
raoults law=
Definition
the vapor pressure of the solvent is directly proportional to the mol fraction of solvent in the solution
Term
boiling point elevation equation
Definition
deltaTsubB=ksubB(n)(m)
Term
boiling point is a ____ number always
Definition
positive
Term
osmotic pressure
Definition
pressure which must be exerted on the more concentrated solution in order to preent the movement of solvent across the semi-permeable membrane
Term
osmotic pressure equation
Definition
pi=MRT
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