Before performing chemical reactions, it is helpful to know how much product will be produced with given quantities of reactants. This is known as the theoretical yield. This is a strategy to use when calculating the theoretical yield of a chemical reaction. The same strategy can be applied to determine the amount of each reagent needed to produce a desired amount of product.
Reagents may be compounds or mixtures. In organic chemistry, most are small organic molecules or inorganic compounds. Examples of reagents include Grignard reagent, Tollens' reagent, Fehling's reagent, Collins reagent, and Fenton's reagent. However, a substance may be used as a reagent without having the word in its name.
Theoretical yield is the yield or measure of mass which can be determined by the help of data like chemical equations, moles, concentrations etc.They do not require any conduct of an experiment.
Experimental yield is the yield or measure of mass which are determined by the means of an experiment.For these values experiment is always conducted.
Calculated based on the chemical equation: Theoretical yield
Measured directly : Experimental yield
Determined experimentally : Experimental yield
Determined using stoichiometry : Theoretical yield