please help- so which one is better part b has a percent yield of 76.8 percent and its melting point is what was expected also in part A but percent yield is 71.67 percent. this would be a sucess exeriment and pure? please explain

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter13: The Chemistry Of Solutes And Solutions
Section: Chapter Questions
Problem 107QRT
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    please help- so which one is better part b has a percent yield of 76.8 percent and its melting point is what was expected also in part A but percent yield is 71.67 percent. this would be a sucess exeriment and pure?

please explain 

      Part A

NaoH= 2.5g = 0.0625 mol

Benzaldehyde= 2.65 g =0.0250 mol

Acetone 0.725 g = 0.0125 mol

Theoretical yield=0.0125 mol

Actual yield= 2.1g

Percent yield=71.67%

Expected melting point= 110.5-112 degree Celsius

Melting point observered= 112 degree Celsius

 

Part B

acetophenone 0.5 g, 4.2 mmol

Para-methylbenzaldehyde 0.5 g, 4.2 mmol

NaOH=0.18g = 4.5 mol

Theroretical yield=0.93g =0.0519 mol

Percent yield=76.8%

Actual yield= 0.715 g

Melting point observered= 93 degree Celsius

Expected melting point =93-94.5 degree Celsius

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