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Yield (chemistry)

In chemistry, yield, also referred to as reaction yield, is the amount of product obtained in a chemical reaction. The absolute yield can be given as the weight in grams or in moles (molar yield). The percentage yield (or fractional yield or relative yield), which serves to measure the effectiveness of a synthetic procedure, is calculated by dividing the amount of the obtained desired product by the theoretical yield (the unit of measure for both must be the same):

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In Organic Chemistry, if you have taken it or will, you'll notice very soon how important that percent and amount yield is. You want the highest amount of product you can produce. When you finally make it to Biochemistry, and depending if you choose to take it, you will notice that this practice takes a back seat to just the one major question "Does it work?". In Biochemistry and Biological Chemistry you stop looking for yield and start looking for active results on a biological system. Many Professors and researcher's I have worked with have all found that to be an interesting and true piece of information, that you will usually see at any school or lab.

Contributed by Stephen Shay

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