Question

yield b. Theoretical Yield c. Percentage Yield d. Amount of the reactant unused Actual yield will reach the ideal (theoretical) value if the % yield of the eaction is, a 10% b. 50% c. 90% 100% he maximum No. of moles the distinction between limiting and excess reagent? ical Questions u​

Answer 1

Answer:

Theoretical and Actual Yields

Reactants not completely used up are called excess reagents, and the reactant that completely reacts is called the limiting reagent. This concept has been illustrated for the reaction:

2Na+Cl2→2NaCl(1)

Amounts of products calculated from the complete reaction of the limiting reagent are called theoretical yields, whereas the amount actually produced of a product is the actual yield. The ratio of actual yield to theoretical yield expressed in percentage is called the percentage yield.

percentyield=actualyieldtheoreticalyield×100

Chemical reaction equations give the ideal stoichiometric relationship among reactants and products. Thus, the theoretical yield can be calculated from reaction stoichiometry. For many chemical reactions, the actual yield is usually less than the theoretical yield, understandably due to loss in the process or inefficiency of the chemical reaction.