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Colligative properties
AP Chem solutions
31
Chemistry
Undergraduate 1
11/30/2010

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Term
What condition must an IMF be in for solutions
Definition
when solute to solvent attractions are greater than the solute to solvent attractions
Term
Hydration
Definition
Solvation where water is the solvent
Term
Ion dipole solivation
Definition
solution of water and ionic solute
Term
London dispersion
Definition
dominate in non polar solute solvent interactions
Term
Solivation
Definition
interactions between solute and solvent
Term
Name the 3 steps in solivation
Definition
1. Expansion of solute 2. expanding solvent 3. Formation of solute solvent IMF
Term
Spontanaity and NRG
Definition
Requires input of energy to dissolve and increase of entropy
Term
Solutions will occur with spontanaity if
Definition
energy requirments are lowered results in endothermic solution
Term
Crystalization
Definition
particles bumping into eachother and becoming solid
Term
Saturated solutions
Definition
eq is established with the solute
Term
Solubility
Definition
amount opf solute needed to form a saturated solution in a given amount of solute
Term
unsaturated
Definition
less solute
Term
supersaturated
Definition
more solute than can be fully dissolved
Term
Polar/ non polar affect on solubility
Definition
Like dissolves likes. Polar/ hydrophillic
Nonpolar/ hydrophobic
Term
Henry's law
Definition
P=KC
Term
Henrys law definition
Definition
THe amount of gas dissolved in a solution is directly proportional to the pressure of the gas above the Soln
Term
How does temp affect the solubilitty of solids
Definition
Increase in temp increases solubility
Term
How does temp effect the solubility of gasses
Definition
increase in temp lowers solubility
Term
COlligative properties
Definition
properties that depend on the amount of solute
Term
Boiling point elevation
Definition
increase in concentration increase in BP
delta t= Km
Term
Freezing point depression
Definition
increase in concentration decrease in freezing point delta t= Km
Term
Vapor pressure
Definition
pressure exerted by a liquid in a closed container
Term
Non volatile liquid
Definition
liquid with no measurable vapor pressure
Term
volatile liquid
Definition
liquid with vapor pressure adding a non lowers VP
Term
Osmosis
Definition
movement of a solvent through a semi-permeable membrane toward the area of lower solute concentration
Term
Osmotic pressure
Definition
pressure neccesary to keep water from flowing across a semi permeable membrane
Term
Formula for osmotic pressure
Definition
pi= MRT
Term
Collids
Definition
solutions with particles that are too big to dissolve but too small to settle out
Term
Collodial dispersions
Definition
dividing lines between solutions and heterogenuos mixtures( tiny particles suspended in medium)
Term
Tyndall effect
Definition
scattering of light by particles light passes through a solution but not through the collid
Term
Couagulation
Definition
enlargong the collid particles so they can settle out to be removed from the solution
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