Page 1 of 1

### Percent Yield

Posted: Thu Oct 05, 2017 12:26 am
Why is having a high percentage yield good? Around what percentage is considered good?

### Re: Percent Yield  [ENDORSED]

Posted: Thu Oct 05, 2017 1:37 am
A high percent yield means that there were fewer outside errors in the application of a chemical reaction. You want the actual yield to be as close to the theoretical yield as possible to allow for more accurate predictions and calculations. High yield may indicate that there are fewer impurities in the compounds involved, fewer environmental factors that cause discrepancies, and less product stuck to the side of a test tube (when actually conducting an experiment). There isn't a set yield that is considered "good." I hope that helped.

-Wenxin Fan 1H

### Re: Percent Yield

Posted: Thu Oct 05, 2017 8:54 am
In a lab setting, chemist typically try to achieve a a yield of 90% of higher. This is primarily because in an actual experiment, there is often more than one reaction, so if the yield of the first reaction is low, the yield will get lower with each consecutive reaction.

### Re: Percent Yield

Posted: Thu Oct 05, 2017 8:52 pm
A high percent yield is better because it suggests that there were fewer impurities that occurred during the experiment and can help with the accuracy of calculations.

### Re: Percent Yield

Posted: Thu Oct 05, 2017 9:38 pm
Also, another reason a high yield is important is if you're preparing a solution or a chemical that is an intermediate step to a larger experiment, the lower the yield the worse off the entire experiment becomes. If you think about it mathematically, it's similar to the function p= (C)^x where C is your percent yield, and x is the number of dependent experiments run one after the other. Even if you have a 90% yield at each step, your overall accuracy drops drastically: after five consecutive experiments your yield will become around 59%.

### Re: Percent Yield

Posted: Sun Oct 08, 2017 11:07 am
Having a high percentage yield is good because that means the product is being created to its full capacity. This is important when performing experiments because chemists want to make sure they are being as accurate as possible and if not all their product is forming then this can cause for wrong measurements.