vocabulary from summer assignment Flashcards
activation energy
minimum energy needs to be added to a system in order for the chemical reaction to occur, how much energy it needs to work
anion
negatively charged ion
arrhenius acid
donates an h+ ion, can easily give hydrogen ion or proton in its aqueous solution
Arrhenius base
Donates an OH- ion
atom
smallest constituent unit of ordinary matter that has the properties of a chemical element
atomic mass
average of all naturally occurring isotopes
atomic number
number of protons; defines the atom
boiling
phase change from a liquid to a gas
Bronsted-Lowry Acid
proton donor
Broasted-Lowry Base
proton acceptor
Calorimetry
-means of measuring the heat gained/lost by a system during a chemical reaction
- used to measure the amount of heat transferred from one substance to another
catalyst
lowers the activation energy
speeds up a reaction
not a reactant, not a product
cation
positively charged ion
chemical equilibrium
rate of the forward reaction equals the rate of the reverse reaction
condensation
phase change from a gas to a liquid
covalent bond
bond formed by the sharing of electrons between atoms
mutual sharing of one or more electrons between two atoms
deposition
phase change from a gas to a liquid
dipole-dipole interaction
attractive forces between the positive end of one polar molecule and the negative end of another
permanent IMF present in polar molecules
dissociate
to break into ions
dissolve
to break into smaller pieces
distillation
process of separating liquids based on differences in boiling temperatures
electrolyte
dissociates into charge particles which are capable of conducting electricity
electrolytic cell
redox reaction that is spontaneous
converts electrical energy into chemical energy
electron affinity
energy released when an atom gains an electron (negative ion)
electron
negatively charged particle, located in the orbitals surrounding the nucleus
electronegativity
the ability of an atom to attract electrons from another atom
empirical formula
lowest whole number ratio of atoms in a compound (simplified formula)
endothermic
energy is gained by the system
exothermic
energy is released by the system
evaporation
process of removing water from an aqueous solution. solute is left behind
filtrate
a liquid that has passed through the filter paper
filtration
process of separating a precipitate from its aqueous solution
freezing
phase change from a liquid to a solid
galvanic / voltaic cell
uses chemical reaction to produce electrical energy
redox reaction that is spontaneous
halogen
elements in group 17
form halides as ions
hydrogen bonding
strong dipole that results when H is bonded to F, O, or N
intermolecular forces
attractive forces between molecules
ionization energy
energy required to remove the outer electron
kinetic energy
energy of motion, temperature is a measure of KE
limiting reactant
reactant that runs out first thus limiting the amount of product that can be formed
london dispersion forces
weakest IMFs (part of VanDer Waals forces)
temporary IMF caused by the movement of electrons
lone pair
unbounded electrons
melting
phase change from solid to liquid
molar mass
grams per 1 mol
molarity
moles of solute per liter of solution
molecular formula
actual number of moles of each atom in a compound
noble gases
group 18 elements
each has 8 valence electrons
nonreactive
precipitate
solid matter that forms from the reaction of 2 aqueous solutions
sublimation
phase change from a solid to a gas
specific heat
energy required to raise 1 gram of substance 1C