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Colligative properties pre-lab

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rexeloji's version from 2015-12-13 20:39

Section

Question Answer
distinguish solute and solventsolute: lesser component in a soluton; solvent: greater component in a solution
3 colligative propertiesboiling point, freezing point, osmotic pressure, and vapor pressure
Colligative properties:due to being related to the amount of energy of collisions between particles and not to the identity of the particles
distinguish volatile and nonvolatilevolatile: higher vapor pressure at room temperature; nonvolatile: lower vapor pressure at room temperature
What effect does the presence of a nonvolatile solute have upon vapor pressure of a solution?lower vapor pressure
What effect does the presence of a nonvolatile solute have upon the freezing point?lower freezing point
What effect does the presence of a nonvolatile solute have upon the boiling point?higher boiling point
What is supercooling?Involves lowering the temperature of substance below its normal freezing point w/o the substance solidifying
How can supercooling be minimized?By cooling slowly with rapid stirring
Define molalitymoles of solute/mass of solvent (Kg)
Define molaritymoles of solute/volume of solution (L)
memorize