Limiting Reactant (4.3)

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Percent yield

actual yield/theoretical yield times 100

actual yield

amount of product actually produced by a chemical reaction

theoretical yield

amount of product that can be made based off the amount of limiting reactant

To determine limiting reactant Step 1: grams to moles then use stoichiometric coefficients to switch moles , whichever one is smaller that is the limited reactant

g of compound A to moles of compound A g of compound B to moles of compound B take the moles of compound A and B and compare the stoichiometric coefficients of the reactants with the product

Step 2: Theoretical Yield : Convert the amount of product made by the limiting reactant to grams

mol of La * molar mass of product/mol of product

limiting reactant

reactant that is completely consumed in a chemical reaction and limits the amount of product

Excessive Reactant

reactant that occurs in a quantity greater than required


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