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Chapter 15
Solutions
20
Chemistry
10th Grade
03/17/2008

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Term
soluble
Definition
when a substance can dissolve in a solvent
Term
miscible
Definition

two liquids that are soluble in each other

Term
solvation
Definition
process of surrounding solute particles with solvent particles to form a solution
Term
heat of solution
Definition

the overall energy that occurs during the solution formation process

Term
solubility
Definition
maximum amount of solute that will dissolve in a given amount of solvent
Term
saturated solution
Definition
contains the maximum amount of solute
Term
supersaturated solution
Definition
contains more dissolved solute than the maximum amount
Term
concentration
Definition

a measure of how much solute is dissolved in a given amount of solvent

Term
molarity (M)
Definition

number of moles of solute dissolved per liter of solution

Term
molality(m)
Definition

the ratio of the number of moles of solute dissolved in one kg of solvent

Term
mole fraction
Definition

ratio of the number of moles of solute in solution to the total number of moles of solute and solvent

Term
colligative property
Definition
physical properties of solutions that are affected by the number of particles but not the identity of dissolved solute particles
Term
vapor-pressure lowering
Definition

the greater the number of solute particles in a solvent, the lower the resulting vapor pressure

Term
boiling-point elevation
Definition
temperature difference between a solution’s boiling point and a pre solvent’s boiling point
Term
freezing-point depression
Definition
the difference in temperature between a solution’s freezing point and the freezing point of its pure solvent
Term
osmosis
Definition
diffusion of solvent particles across a semipermeable membrane from higher to lower solvent concentration
Term

suspension

Definition

a mixture containing particles that settle out if left undisturbed

Term
colloid
Definition
a heterogeneous mixture of intermediate (between solution and suspension) size particles
Term
Brownian motion
Definition
the erratic movement of colloid particles
Term
Tyndall effect
Definition

phenomena in which colloid particles scatter light

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