5.15 Percent Yield

This is the final chapter in stoichiometry, and it is probably the easiest.

Stoichiometry is used to calculate how much of a certain product should be produced. Generally speaking, chemical reactions rarely produce all the product they are supposed to (some of the reactants may get lost, the reaction may not go all the way to completion, there may be side-reactions taking place...). And so chemists are always concerned with their "percent yield." Percent yield is simply how much was actually produced divided by how much should have been produced (x 100%). Sometimes a 5% yield is considered wonderful, especially in organic chemistry.

The following questions all involve percent yield. You can probably figure these out for yourself, but if you need some help, check out the jing videos:
http://www.screencast.com/users/KRBecker/folders/5.%20Percent%20Yield

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