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29
Chemistry
10th Grade
03/01/2006

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Term
Boiling point elevation
Definition
The temperature difference between a solution's boiling point and a pure solvent's boiling point
Term
Brownian motion
Definition
The jerky, random, rapid movements of colloid particles that results from collisions of particles of the dispersion medium with the dispersed particles
Term
Colligative property
Definition
a Physical property of a solution that depends on the number, but not the identity, of the dissolved solute particles; Example properties include vapor pressure lowering, osmotic pressure, and freezing point depression
Term
Colloids
Definition
heterogeneous mixtures containing particles larger than solution particles but smaller than suspension particles that are categorized according to the phases of their dispersed particles and dispersing mediums
Term
Concentration
Definition
a quantitative measure of the amount of solute in a given amount of solvent or solution
Term
Freezing Point depression
Definition
The difference in temperature between a solution's freezing point and the freezing point of its pure solvent
Term
Heat of Solution
Definition
the overall enery change that occurs during the solution formation process
Term
Henry's Law
Definition
States that at a given temperature, the solubility of a gas in a liquid is directly proportional to the pressure of the gas above the liquid
Term
insoluble
Definition
not able to be dissolved
Term
immiscible
Definition
two or more substances that are not soluble in each other
Term
miscible
Definition
two or more substances that are soluble in each other
Term
Molality
Definition
the ratio of the number of moles of solute dissolved in one kilogram of solvent; also known as molal concentration
Term
Molarity
Definition
the number of moles of solute dissolved per liter of solution; also known as molar concentration
Term
Mole Fraction
Definition
the ratio of the number of moles of solute in solution to the total number of moles of solute and solvation
Term
osmosis
Definition
the diffusion of solvent particles across a semi-permeable membrane from an area of higher solvent concentration to an area of lower solvent concentration
Term
osmotic pressure
Definition
the additional pressure needed to reverse osmosis
Term
saturated solution
Definition
Contains the maximum amount of dissolved solute for a given amount of solvent at a specific temperature and pressure
Term
Solubility
Definition
the maximum amount of solute that will dissolve in a given amount of solvent at a specific temperature and pressure
Term
soluble
Definition
able to be dissolved; a solute must be soluble
Term
solute
Definition
the substance being dissolved
Term
solution
Definition
a homogenous mixture
Term
Solvation
Definition
The process of surrounding solute particles with solvent particles to form a solution. Can only occur where and when the solute and solvent particles come in contact with each other.
Term
solvent
Definition
the substance that dissolves the solute
Term
Supersaturated solution
Definition
contains more dissolved solute than a saturated solution at the same temperature
Term
Suspension
Definition
A type of heterogeneous mixture whose particles settle out over time and can be separated from the mixture by filtration
Term
Tyndall effect
Definition
The scattering of light by colloidal particles
Term
unsaturated solution
Definition
Contains less dissolved solute for a given temperature and pressure than a saturated solution; has a further capacity to hold more solute
Term
Vapor pressure lowering
Definition
the lowering of vapor pressure of a solvent by the addition of a nonvolatile solute to the solvent
Term
Freezing Point depression
Definition
The difference in temperature between a solution's freezing point and the freezing point of its pure solvent
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