A Level Chemistry OCR Practice Exam

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What is indicated by the term 'actual amount' in the yield formula?

Theoretical amount predicted by calculations
The amount of product actually obtained from a reaction
The total number of reactants used during a reaction
The total possible yield of a theoretical process

The correct answer is: The amount of product actually obtained from a reaction

The term 'actual amount' in the yield formula specifically refers to the amount of product that is actually obtained from a chemical reaction when it is carried out in practice. This value is important because it allows chemists to assess the efficiency of a reaction. The actual yield can be influenced by various factors such as incomplete reactions, side reactions, or losses during the purification process. Theoretical yield, on the other hand, is the maximum amount of product expected based on stoichiometric calculations from the balanced chemical equation. This distinction between actual and theoretical yield is fundamental in chemistry, particularly in assessing the success and efficiency of reactions.