Calculating yield of a product in percentage %

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Calculating yield of a product in percentage %

Post by hananism »

Good evening! :)
The reaction in the attached image is a reaction I run in the laboratory with those same written quantities (in grams)/ volumes (in mL).
And in the report they ask us to write the mass of the product, the moles and the yield in %.
The yield is a new thing for me, I looked in the internet and I found out that we should first know what we call the actual yield and calculate what we call the theoretical yield.. when I wanted to do so, I just got confused in the calculations and didn't know which values I need to use to finally get the percentage Yield % of the product (which is number (4) in the reaction), and how to do it.

I would be very thankful if you help me with this!
Much respect!
yeld in percentage for the product.jpg
yeld in percentage for the product.jpg (102.09 KiB) Viewed 97 times
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Re: Calculating yield of a product in percentage %

Post by ChenBeier »

First the equation is not balanced.
The p-Methoxyacetophenone and the toluene react 1:1
So you have to calculate the moles of each component and calculate what is in excess .
What has the lower value drives the reaction.
This amount gives moles of the product. Calculated with the molar mass gives the mass of the product. Theoretically.
Then compare the mass of the product what was obtained practically and devide it by the theoretical mass times 100% gives the yield.
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