Stoichiometry Test Review

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Actual yield

the amount of chemical that you actually make

Theoretical yield

the amount of product which should be made in a chemical reaction

Limiting reactant

the cemical that determines how far the chemical reaction will go before the chemical in question gets used up, causing the reaction to stop

Percent yield

The actual yield divided by the theoretical yield times 100

Excess reactant

the reactant that remains when a reaction stops when the limiting reactant is completely consumed

is conserved in every oridnary chemical reaction

mass

the______is the quantity that can be used in the same way as moles when interpreting blanaced chemical equations

number of molecules

the _____is conserved only in reactions where te temperature is constant and the number of moles of gasous reactants is the same as that of gasous products

volume

the calculation of quantitites in chmical equationstis called

stoichiometry

what four things are conserved?

mass, moles, molecules, and volume

in every chemical reaction, ___and ____ are conserved

mass, atoms

in a chemical reaction, the mass of the products is_____to the mass of the reactants

equal

which type of stoichimetric calculation does not requre the use of the molar mass?

volume to volume

when two substances react to form products, the reactnat which is used up is called the

limiting reactant

when an equation is used to calculate the amount of product that will form during a reaction, then the value obtained is called the

theoretical

the amoun of product obtained is determine by the limiting reagent

true

the react that has teh smallest given mass is the limiting reagent

false

a blanced equation is necessary to determine which reactant is the limiting reagent

true

some of teh excess reagent is left over after the reaction is complete

true

list thee reasons why the actual yield would be less than theoretical yield

impure reactants present, competing side reactions, and loss of product during purification

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