The percent yield of the reaction : 77.2%
Percent yield is the comparison of the amount of product obtained from a reaction with the amount you calculated
General formula:
Percent yield = (Actual yield / theoretical yield )x 100%
An actual yield is the amount of product actually produced by the reaction. A theoretical yield is the amount of product that you calculate from the reaction equation according to the product and reactant coefficients
Reaction
Cu + 4HNO₃ → Cu(NO₃)₂ + 2NO₂ + 2H₂O
mol of Cu(MW=63.55 g/mol) :
[tex]\tt \dfrac{4.54}{63.55}=0.071[/tex]
mol ratio Cu : Cu(NO₃)₂ = 1 : 1, so mol Cu(NO₃)₂ :
[tex]\tt \dfrac{1}{1}\times 0.071=0.071[/tex]
mass of Cu(NO₃)₂ (MW=187,56 g/mol) :
[tex]\tt mass=mol\times MW\\\\mass=0.071\times 187,56 g/mol\\\\mass=13.317~g\rightarrow theoretical~yield[/tex]
10.28 g of Cu(NO₃)₂ are obtained from the reaction⇒actual yield
The percent yield :
[tex]\tt \%yield=\dfrac{actual}{theoretical}\times 100\%\\\\\%yield=\dfrac{10.28}{13.317}\times 100\%\\\\\%yield=77.2\%[/tex]
