Stoichiometry Chemistry test
In most chemical reactions the amount of product obtained is
. less than the theoretical yield.
In the reaction A + B --> C + D, if the quantity of B is insufficient to react with all of A,
B is the limiting reactant
Which of the following is NOT true about "yield"?
The actual yield may be different from the theoretical yield because insufficient limiting reagent was used.
Which of the following is NOT true about limiting and excess reagents?
The reactant that has the smallest given mass is the limiting reagent
What is the measured amount of a product obtained from a chemical reaction
actual yield
To determine the limiting reactant in a chemical reaction, one must know the
available mount of each reactant
Which of the following is NOT a reason why actual yield is less than theoretical yield?
conservation of mass
The substance not completely used up in a chemical reaction is known as the
excess reactant
Actual yield must be determined by
experiments
When the limiting reactant in a chemical reaction is completely used, the
it stops
The actual yield of a chemical reaction is
less than the theoretical yield.
After calculating the amount of reactant B required to completely react with A, then comparing that amount with the amount of B available, one can determine the
limiting reactant
The substance that restricts the participation of other reactants in a chemical reaction is known as the
limiting reactant
A chemical reaction involving substances A and B stops when B is completely used. B is the
limiting reactant.
A chemist interested in the efficiency of a chemical reaction would calculate the
percent yield
What is the ratio of the actual yield to the theoretical yield, multiplied by 100%?
percentage yield
If the percent yield is equal to 100%, then
the actual yield is equal to the theoretical yield
To determine the limiting reactant in a chemical reaction involving known masses of A and B, one could first calculate
the number of moles of B and the number of moles of A available
What is the maximum possible amount of product obtained in a chemical reaction?
theoretical yield