Calculate the theoretical yield for Cu. We are told that CuSO4 is in excess, and so the
theoretical yield will be dictated by the amount of Zn:
31.6 g Cu = theoretical yield
This is the most one can ever hope to get. The actual yield, we are told, is 27 g. The
percent yield is therefore
THINGS TO REMEMBER
Molecular Weight and Molar Mass
Law of Constant Composition
Empirical and Molecular Formulas
Percent Composition
Synthesis Reactions
Decomposition Reactions
Single Displacement Reactions
Double Displacement Reactions
Net Ionic Equations
Balancing Equations
Applications of Stoichiometry
Limiting Reactants
Yields
