Question

did you get a % yield >70%? please share your theoretical and experimental grams product used in your calculation. if >70%, what was the secret to your success? if not, what would you need to do differently next time to achieve that yield or better?

Answer 1

The percent yield in chemistry represents the efficiency of a reaction, comparing actual and theoretical yields. Achieving a high percent yield may involve minimizing product loss and avoiding impurities; issues like incomplete reactions or measurement errors can lead to low yields.

Step-by-step explanation:

Understanding Percent Yield in Chemistry

In chemistry, the percent yield is a measure of the efficiency of a chemical reaction. It represents the ratio of the actual yield to the theoretical yield, expressed as a percentage. The theoretical yield is calculated based on the stoichiometry of the reaction, while the actual yield is the amount of product that is actually obtained after performing the experiment.

To calculate the percent yield, one would use the formula:

percent yield = (actual yield / theoretical yield) x 100%

For a successful laboratory experiment, a percent yield over 70% is often seen as good, while a percent yield between 80%-90% is considered very good to excellent. Factors that can contribute to a higher percent yield include minimizing product loss through careful technique, avoiding contamination and impurities, and conducting reactions to completion. Conversely, low percent yields may result from incomplete reactions, side reactions, or losses during product recovery.

To achieve a higher percent yield, one should ensure accurate measurements, maintain reaction conditions as close as possible to the ideal, and refine purification methods to minimize the presence of impurities. Keeping equipment clean and dry can also prevent higher-than-expected yields due to contaminant mass.