Theoretical/Actual Yield

Haorui Li 1A
Posts: 30
Joined: Mon Jun 17, 2019 7:23 am

Theoretical/Actual Yield

What is the unit for theoretical yield or actual yield? In the example Dr. Lavelle provided in class the unit was in grams, does it always need to be in grams or based on different questions the unit changes?

Chem_Mod
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Re: Theoretical/Actual Yield

Most of the time, actual yield is given in grams and theoretical yield will be calculated in grams. You can use these to determine the percentage yield.
Percentage yield = actual yield/theoretical yield * 100

Sisi Li 1F
Posts: 34
Joined: Mon Mar 11, 2019 12:15 am

Re: Theoretical/Actual Yield

It seems that because most of our problems are given in terms of grams, yields will also be in grams

duenezjuleny1D
Posts: 48
Joined: Fri Sep 28, 2018 12:24 am

Re: Theoretical/Actual Yield

Usually in grams since most of the problems give to us will be in grams. But I also depends on if you’re converting/how you will convert.

Kevin To 1B
Posts: 32
Joined: Sat Feb 02, 2019 12:15 am

Re: Theoretical/Actual Yield

When calculating percent yield in a lab, the product obtained from a reaction/experiment will generally be weighed and its mass is recorded. Therefore, knowing that actual yield is in a unit of mass, theoretical yield has to also be in the same unit of mass in order to calculate percent yield.

205458163
Posts: 33
Joined: Wed Jun 26, 2019 12:15 am

Re: Theoretical/Actual Yield

Most of the time, it is in grams. Sometimes it might be the kg, but it's very rare.

Zachary Menz 1D
Posts: 32
Joined: Wed Nov 07, 2018 12:17 am

Re: Theoretical/Actual Yield

Yield will be calculated as a mass, usually just grams, but you could also see kg or mg in some problems. For percent yield, you're dividing a unit by the same unit so it cancels (like grams/grams) which is why percent yield doesn't have a mass unit, it's just a percentage.