## Calculating yield of a product in percentage %

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hananism
Newbie
Posts: 4
Joined: Sun Nov 21, 2021 12:22 pm

### Calculating yield of a product in percentage %

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!
Attachments
yeld in percentage for the product.jpg (102.09 KiB) Viewed 97 times
ChenBeier
Distinguished Member
Posts: 1005
Joined: Wed Sep 27, 2017 7:25 am
Location: Berlin, Germany

### Re: Calculating yield of a product in percentage %

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.