Shared Flashcard Set

Details

AP Chem Finals Vocabulary
Uh Oh
74
Chemistry
Not Applicable
05/15/2006

Additional Chemistry Flashcards

 


 

Cards

Term
Electronic Structure
Definition
The arrangement of electrons of an atom or molecule
Term
Electronic Structure
Definition
the arrangement of electrons of an atom or molecule
Term
Electromagnetic radiation
Definition
a form of energy that has wave characteristics and that propagates through a vacuum at speed of light
Term
wavelength
Definition
the distance betwenn identical points on successive waves.
Term
frequency
Definition
the number of times per second that one complete wavelength passes a given point
Term
quantum
Definition
the smallest increment of radiant energy that may be absorbed or emitted; the magnitude of radiant energy is hv
Term
photon
Definition
the smallest increment of radiant energy; a photon of light with frequency v has an energy equal to hv
Term
spectrum
Definition
the distribution among various wavelengths of the radiant energy emitted or absorbed by an object
Term
continous spectrum
Definition
A spectrum that contains radiation distributed over all wavelengths
Term
line spectrum
Definition
A spectrum that contains radiation at only certain specific wavelengths.
Term
groud state
Definition
"the lowest energy, or most stable, state"
Term
excited state
Definition
a higher energy state than the ground state
Term
matter waves
Definition
the term used to describe the wave characteristics
Term
chemical bonds
Definition
a strong attractive force that exists between two atoms
Term
ionic bond
Definition
a bond between oppositely charged ions.
Term
covalent bond
Definition
a bond formed between two or more atoms by a sharing of electrons
Term
lewis symbol
Definition
the chemical symbol for an element with a dot for each valence electron
Term
octet rule
Definition
a rule stating that bonded atoms tend to possess or share a total of eight valece shell electrons
Term
lattice energy
Definition
the energy required to separate ompletely the ions in an ionic solid
Term
hess's law
Definition
"The heat evolved in a given process can be expressed as the sum of the heats of several processes that, when added, yild the process of interest"
Term
isoelectronic series
Definition
"a series of atoms, ions, or molecules having the same number of electrons"
Term
single bond
Definition
a covalent bond involving one electron pair
Term
double bond
Definition
a covalent bond involving two electron pair
Term
triple bond
Definition
a covalent bond involving three electron pairs
Term
multiple bonding
Definition
bonding involving two or more electron pairs
Term
nonpolar covalent
Definition
a covalent bond in which the electrons are shared equally
Term
polar covalent
Definition
a covalent bond in which the electrons are not shared equally
Term
electronegativity
Definition
a measure of the ability of an atom that is bonded to another atom to attract electrons to itself
Term
polar molecule
Definition
a molecule that possesses a nonzero dipole moment
Term
dipole
Definition
a molecule with one end having a slight begative harge and the other end having a slight positive charege; a polar molecule
Term
resonance structures
Definition
"two lewis structures are equally good descriptions of a single molecule, they are averaged to give correct description of the real moleule"
Term
bond enthalpy
Definition
the enthalpy charge required to break a particular bond when the substance is in the gas phase
Term
conjugate base
Definition
a substance formed by the loss of a proton from a bronsted lowry acid
Term
conjugate acid
Definition
a substance formed by the addition of a proton from a bronsted lowry acid
Term
conjugate acid base pair
Definition
an acid and a base that difer only in the presence or absence of a proton
Term
amines
Definition
"a compound that has the general formula R3N, where r may be h or a hydrocarbon group"
Term
polyprotic acids
Definition
a substance capable of ionizing more than one proton in water.
Term
base dissociation constant
Definition
"an equilibrium constant that expresses the extent to which a base reacts with solvent water, accepting a proton and forming OH-"
Term
hydronium ion
Definition
the predominant form of the proton in aqueous solution
Term
amphoteric substance
Definition
capable of behaving as either an acid or a base
Term
vapors
Definition
gaseous state of any substance that normally exists as a liquid or solid
Term
presure
Definition
"a measure of the force exerted on a unit area. Often expressed in units of atmospheres, atm, or torr:760torr is 1 atm. Si is expressed in pascals, pa"
Term
pascal
Definition
The SI unit of pressure 1 pa = n/m(squared)
Term
torr
Definition
A unit of pressure 1torr=1mm Hg
Term
ideal gas
Definition
"a hypothetical gas whose pressure, volume, and temperature behavior is completely described by the ideal gas equation"
Term
gas constant
Definition
® the constant of proportionality in the ideal gas equation.
Term
STP
Definition
Defined as 0 celcius and 1 atm pressure; frequently used as reference conditions for a gas
Term
Partial pressures
Definition
the pressure exerted by a particular gas in a mixture
Term
kinetic molecular theory
Definition
"a set of assumptions about the nature of gases. These assumptions, when translated into mathmatical form, yield the ideal gas equation."
Term
solvation
Definition
the clustering of solvent molecules around a solut particle
Term
hydration
Definition
solvation when the solvent is water
Term
crystallization
Definition
the process in which a dissolved solute comes out of solution and forms a crystalline solid
Term
saturated
Definition
a solution in which undissolved solute and dissoved solute are in equilibrium
Term
solubility
Definition
the amount of a substance that dissolves in a given quantity of solvent at a given temperature to form a saturated solution
Term
unsaturated
Definition
solutions containing less solute than a saturated solution
Term
supersaturated
Definition
solutions containg more solute than a saturated solutions
Term
miscible
Definition
liquids that mix in all proportions
Term
immiscible
Definition
liquids that do not mix
Term
Henry's law
Definition
a law stating that the concentration of a gas in a solution is proportional to the pressure of gas over the solution
Term
mass percentage
Definition
the number of grams of solute in each 100g of solution
Term
parts per million
Definition
the concentration of a solution in grams of solute per million grams os solution; equals milligrams of solute per liter of solutoin for aqueous solutions
Term
parts per billion
Definition
the concentration of a solution in grams of solute per billion grams os solution; equals milligrams of solute per liter of solutoin for aqueous solutions
Term
molality
Definition
the concentration of a solution expressed as moles of solute per kilogram of solvent; m
Term
Raoult's law
Definition
a law stating that the partial pressure of a solvent over a solution is given by the vapor pressure of the pure solvent times the mole praction of a solvent in the solution
Term
Ideal solution
Definition
a solution that obeys raoults law
Term
molal boiling-point-elevation constant
Definition
a constant characteristic of a particular solvent that gives the change in boiling point as a function of solution molality
Term
molal freezing-point-point-depression constant
Definition
a constant characteristic of a particular solvent that gives the change in freezing point as a function of solution molality
Term
osmosis
Definition
the net movement of solvent through a semipermeable membrane toward the solution with greater solute concentration
Term
osmotic pressure
Definition
the pressure ethat must be applied to a solution to stop osmosis from pure solvent into the solution
Term
colloidal dispersions/colloids
Definition
mixtures containing particles larger than normal solutes but small enough to remanin suspended in the dispersing medium
Term
hydrophilic
Definition
water loving
Term
hydrophobic
Definition
water fearing
Term
tyndall effect
Definition
the scattering of a beam of visible light by the particles in a colloidal dispersion
Term
colligative properties
Definition
those properties of a solvent that depend on the total conentration of solute particles present
Supporting users have an ad free experience!