Fraction of the theoretical yield obtained experimentally.

• A. Theoretical yield
• B. Actual yield
• C. Percent yield
• D. Yield efficiency

Answer: (C)

In reactions, we compare what could be made at maximum with what was actually obtained. The theoretical yield is the maximum amount of product possible from the given reactants, assuming perfect reaction and 100% conversion. The actual yield is what you realistically collect in the lab. The fraction of the theoretical yield you obtain is expressed as percent yield, calculated as (actual yield / theoretical yield) × 100. This percentage shows how close you came to the ideal amount. For example, if the theoretical yield is 10 g and you actually obtain 7 g, the percent yield is (7/10) × 100 = 70%. So the term that best describes the fraction of the theoretical yield obtained experimentally is percent yield.