Chemistry - Theoretical Yield and Percent Yield

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Theoretical yield is the maximum amount of product that can be made from the reactants given. How much product is made depends on how much reactants you start with. In today's Free Chemistry lecture, Professor Gordon Yee demonstrates first how to calculate theoretical yield for a balanced reaction. When calculating a balanced reaction, things have to be expressed in moles. You then have to calculate a limiting reagent problem to figure out what we will run out of first. Professor Yee gives you two methods of solving this balanced reaction problem. Interestingly, most chemical reactions don't result in as much product as you expect. This is because a lot of reactions don't necessarily go only to one single product. They might give you a couple of products, albeit minor products. Also, when you are purifying your product you lose a little. The actual yield is always going to be less than the theoretical yield. That is where percent yield becomes important, as it is the actual yield expressed as a percentage of the theoretical yield. Watch today's video and learn more about calculating theoretical yield and percent yield.


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This page contains a single entry by April Stockwell published on March 9, 2011 12:35 PM.

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