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Limiting Reactants Practice. Limiting reactants (reagents). In a chemical reaction, there may be one reactant that will “limit” the amount of product that can be formed. This is called a limiting reactant. The reactant that is leftover and not used is called the excess reactant.
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Limiting reactants (reagents) • In a chemical reaction, there may be one reactant that will “limit” the amount of product that can be formed. This is called a limiting reactant. The reactant that is leftover and not used is called the excess reactant.
P4 + 5O2 P4O10 Determine the amount of tetraphosphorus decoxide formed if 50 grams of phosphorus and 100 grams of oxygen are combined. Identify the limiting and excess reactant
2Li + Br2 2LiBr If 25.0 grams of lithium and 25.0 grams of bromine are present, calculate the amount of lithium bromide produced and identify the limiting and excess reactant.
2TbF3 +3Ca 3CaF2 + 2Tb • 27.5 g TbF3 reacts with 6.96 g Ca • Find the LR and ER • How many grams of CaF2 can be produced?
Percent yield % yield = actual yield (from experiment) x 100 theoretical yield (stoich)