# L27 - The effect of side reactions on yield A B(reactants...

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A   +  B (reactants) C (main product) D (side products) The effect of side reactions on yield.

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Actual Yield vs. Theoretical Yield Theoretical Yield:  The amount of product that is calculated to form  when  all  of the limiting reagent has reacted. Actual Yield:  Amount of product that actually forms. Can be less than  the theoretical yield.  Side reactions  Incomplete reaction  Difficulty recovering all the product  % 100  Yield l Theoretica  Yield Actual eld Percent Yi × = 100%       Yield   Percent    % 0
Sample Problem 3.12 Calculating Percent Yield PROBLEM: Silicon carbide (SiC) is an important ceramic material that is made by  allowing sand(silicon dioxide, SiO2) to react with powdered carbon at  high temperature.  Carbon monoxide is also formed.  When 100.0 kg of  sand is processed, 51.4 kg of SiC is recovered.  What is the percent  yield of SiC from this process?

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