Study Chem 10-12 vocab Flash Cards

 
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Chem 10-12 vocab

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percent yield
ratio of actual yeild to theoretical yield in percent
actual yeild
amount product actually forms
theoretical yield
max product amount to form reactions
excess reagent
reactant that isn't used up
limiting reagent
reagent that determines amount of product
mole ratio
conversion factor derived from the coefficeients of a balanced equation in terms of moles
stoichiometry
calculations of quantities in chemical reactions
net ionic ratio
one equation for a reaction in solution that shows only those particles directly involved.
specator ion
ion on both sides of reaction, but not involved
complete ionic equation
shows dissolved ionic compounds and dissocociated free ions
combustion reaction
chemical change that reacts with oxygen and produces heat and light.
double replacement reaction
a chemical change where ions are exchanged between compounds
decomposition reaction
a chemical change in which 1 element replaces a second element in a compound.
combination reaction
chemical change in which 2+ substances react to form a single new substance.
balanced equation
each side of the equation has same # of atoms and mass is concerved
coefficents
placed in front of equation to balance it.
catalyst
speeds up reaction, but isn't used in the reaction itself
chemical equation
represents chemical reaction
Fe + O2(g) ---> Fe2 O3(s)
empirical formula
smallest whole number ratio of the atoms in a compound
percent comp.
(percent by mass)
mass of an element/mass of compound x 100
molar volume
22.4 L of a gas.
STP standard temp and pressure.
0degrees ccelcuis, 1 atom, 22.4 L=gas

mole of gas x 22.4/mol
avogadro's hypothesis
equal volumes of gases at the same temp and pressure contained equals particles.
representative particle
species present in a substance.
(atoms, molcules, formula units)
mole
si unit for measuring the amount of a substance
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