What does a percent yield of 25% tell you about Aspirins idenity and purity? What can you determine?

Introduction

In chemistry, the percent yield is a measure of the efficiency of a chemical reaction, expressed as the percentage of the theoretical yield that is actually obtained in a laboratory experiment. The theoretical yield is the amount of product that would be produced if the reaction went to completion under ideal conditions.

The percent yield is calculated as follows:

$Percent yield = (\frac{Actual yield }{ Theoretical yield}\times 100) \%$

where actual yield is the amount of product obtained in the experiment, and theoretical yield is the amount of product that would be obtained if the reaction went to completion