1. Combustion Analysis
A g sample composed of C, H, N is burned to produce g CO2 and g H2O
Assume all C in the sample is converted to CO2
Assume all H is converted to H2O
To solve:
All C CO2, all HH2O (N is remainder)
Convert g CO2 to moles CO2 then find moles C
Convert g H2O to moles H2O, then find moles H
-gN = 1 1

2. Yield Theoretical yield = calculated amount of product
Use stoichiometry
Experimental yield = actual yield
Amount obtained in a lab
Would be given in a problem “obtained”, “recovered”, etc.
Percent yield = experimental/theoretical x 100
Normally less than 100%
Incomplete reaction
Impure reagents
Experimental error
Side reactions 2 2