The reaction was very efficient, and most of the product was recovered. Low Percent Yield (e.g.. 50% Moderate Percent Yield (e.g., 80% High Percent Yield (e.g. 95% Percent Yield is 100%

Percent yield is a measure of the efficiency of a chemical reaction, indicating the percentage of the theoretical yield that is actually obtained in the experiment. It is calculated using the formula:<br /><br />\[ \text{Percent Yield} = \left( \frac{\text{Actual Yield}}{\text{Theoretical Yield}} \right) \times 100\% \]<br /><br />Here's a breakdown of the categories based on percent yield:<br /><br />1. **Low Percent Yield (e.g., 50%)**: This indicates that only half of the theoretical yield was obtained. This could be due to losses during the reaction, purification steps, or measurement errors.<br /><br />2. **Moderate Percent Yield (e.g., 80%)**: This suggests that about 80% of the theoretical yield was achieved. This is generally considered acceptable for many reactions and indicates a reasonably efficient process.<br /><br />3. **High Percent Yield (e.g., 95%)**: This indicates that nearly all of the theoretical yield was obtained. This is often desired in chemical synthesis and indicates a very efficient reaction.<br /><br />4. **Percent Yield is 100%**: This is theoretically impossible in practical scenarios due to inherent losses and impurities. In practice, achieving a percent yield close to 100% would be highly unusual and might suggest an error in the theoretical yield calculation or experimental conditions.<br /><br />In summary, percent yield helps chemists understand the efficiency of their reactions and identify areas where improvements can be made.