Stoichiometry Of Reactants And Reactants

981 Words Oct 17th, 2014 4 Pages
Furthermore, stoichiometry helps to figure out the limiting reactants and the excess reactants. The limiting reactant is the reactant that limits the amount of product formed in the chemical reaction. Which also means the reaction will stop when all of the limiting reactant is consumed. In the other hand, excess reactant is a reactant that completely used up and it remains when a reaction stop when the limiting reactant. Moreover, stoichiometry can be used to figure out the actual yield which is the amount actually produced of a product vs. the amount of products calculated from the complete reaction of the limiting reactant which is theoretical yield. Also, stoichiometry assists to calculate the percent yield, which is the ratio of actual yield to theoretical yield expressed in percentage.
The principle underlying this experiment is based on keeping the amount of one reactant constant while changing the amount of a second reactant. The mass of the precipitate produced is then used as a sign of the effect of changing the amount of the second reactant. When enough of the second reactant has been added to completely react with the first reactant, there will be no further increase in the amount of the precipitate produced, regardless of how much of the second one is added. So, the purpose of this experiment was to determine the mole ratio relationship and limiting reactant in the reaction between Pb(NO3)2 and KI

The volume of the potassium iodide was held…
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