Final answer:
To determine the percent yield of ethyl 3-phenylpropionate, subtract the weight of the empty round bottom flask from the weight with the crude product to find the actual yield. Without the theoretical yield, we cannot calculate the exact percent yield, but it is inferred to be between 0% and 100%.
Step-by-step explanation:
To calculate the percent yield of ethyl 3-phenylpropionate, we must first determine the actual yield. The actual yield is the mass of the pure product obtained from the reaction. In this case, the difference between the mass of the round bottom flask with the crude product and the empty round bottom flask is the actual yield. So, the mass of the crude product is:
36.769 g - 36.636 g = 0.133 g or 133 mg.
To calculate the percent yield, the theoretical yield must be known. The theoretical yield is the maximum amount of product that could be obtained from a reaction if every molecule of reactant was converted to the product under perfect conditions. Since the theoretical yield is not provided in the question, we cannot calculate the exact percent yield. However, we can utilize the provided multiple-choice options to estimate the range in which the percent yield falls.
The mass of the catalyst Pd/C used is much less than the mass of the product, so it's unlikely that the percent yield is greater than 100%. Thus, without the theoretical yield, but recognizing that some reaction must have occurred to get a nonzero product weight, we can infer that the percent yield falls between 0% and 100%. Therefore, the options are narrowed down to:
- a. 0−25%
- b. 26−50%
- c. 51−75%
- d. 76−100%
Without further information, it is not possible to choose the correct option, but it is clear that option (e. 100−150%) is not correct.