Concept Question on Percent Yield

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Concept Question on Percent Yield

Postby Jennifer1E » Sun Jul 02, 2017 8:42 pm

What exactly is the percent yield and what does it represent? I understand that the theoretical yield is how much product is made when all the reactant is used and the actual yield is the actual amount of product produced but I am not too sure what exactly is the percent yield.

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Re: Concept Question on Percent Yield

Postby Chem_Mod » Sun Jul 02, 2017 9:45 pm

percent yield represents the extent to which a reaction was successful. Basically, in a perfect reaction the theoretical yield would be achieved every time and the percent yield would be 100%. However, that is not the case in real life because of human error or a reaction might not have fully gone to completion or the reaction conditions (temperature or amount of reactants) might not be ideal. Percent yield tells chemists what percent of the expected amount of product was actually made when a reaction was run. This is a very important concept, not only in our discussion of chemistry but in real world research, mainly it is used very frequently in synthetic chemistry. Often when a new reaction to synthesize a product is reported in a journal it will have percent yield included to show that under the conditions reported the reaction will produce a certain amount of product.

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