Ch.9 Chemical Quantities Flashcards
a balance chemical eq gives
relative numbers (or moles) of reactant and product particles that participate in a chemical reaction
the coefficients of a balanced equation give
relative numbers of particles
chemical equations tell us
that the macroscopic (molar change corresponds to the submicroscopic ( molecular change)
the coefficients in a balanced chemical reaction are called
stoichiometric coefficients
stoichiometric coefficients represent
the relative number of reactant and product particles
the relative number of moles of each
what is stoichiometry?
the process of using a balanced chemical reaction to determine the amounts of ( mole or molasses) of reactants needed or products formed
what does a mole ratio do?
allow us to convert moles of a substance in a balanced equation to moles of
What is a stoichiometric mixture?
contains the relative amounts of reactions that match the number in the balanced equation
what is the limiting reactant ( or limiting reagent)?
the reactant that runs out first and thus limits the amounts of products that can form
what is a reactant in excess?
any reactant that occurs in a quantity greater than is required to react with the limiting reactant completely
what is the theoretical yield?
the amount of product that can be made in a chemical reaction based on the amount of limiting reactant
how do you find the limiting reactant and theoretical yield from initial mass?
convert the masses to amounts in moles
what is the reactant that produces the smallest amount of product?
limiting reactant
what is the theoretical yield?
the amount of product calculated from the mole ratio in the balanced chemical reaction
what is the actual yield?
the amount of product you actually get when you carry out the reaction
