Tanmay Singhal 1H
Posts: 143
Joined: Sat Jul 20, 2019 12:16 am

Is there any difference between calculating theoretical yield with grams versus theoretical yield with moles?

Arvind 4G
Posts: 51
Joined: Thu Jul 11, 2019 12:17 am
Been upvoted: 1 time

No, they should be the same. If you calculate the theoretical yield in moles then you can convert that into grams as well. Grams and moles can be converted back and forth into one another so when calculating in one, you can just convert it to the other.

Jarrett Peyrefitte 2K
Posts: 102
Joined: Sat Aug 24, 2019 12:16 am

Depending on what the question is asking for, there should be no difference because you are able to convert moles to grams and also can be able to convert grams to moles.

For grams to moles: moles x grams /1 mol

For moles to grams: grams x 1 mol / grams

Posts: 52
Joined: Thu Jul 11, 2019 12:16 am
Been upvoted: 1 time

I usually find it quicker to just solve to moles first, then convert to grams with the smaller amount. I think the comparison should be done in moles anyway, given that most ratio-comparison things are done with moles.

ATingin_3I
Posts: 51
Joined: Fri Aug 30, 2019 12:17 am

Tanmay Singhal 3F wrote:Is there any difference between calculating theoretical yield with grams versus theoretical yield with moles?

no, they should be the same. if they aren't then you need to check the conversion factor you are using between grams and moles.

RobertXu_2J
Posts: 104
Joined: Fri Aug 30, 2019 12:17 am

There is no difference between calculating theoretical yield with grams versus theoretical yield with moles. The only difference would be what units your answer is in. Something to always be careful about is what units the question wants your answer to be in. If you find that your units are different from what the question asked for, you can simply convert it using the molar mass.

Julie_Reyes1B
Posts: 105
Joined: Sat Jul 20, 2019 12:16 am

I agree with Robert. It is true that they are the same. However, in general you should pay attention to the units you are given in the question. Your answer should ideally have the same units. For example, if the question uses grams, try to use grams in your answer rather than moles, milligrams, kilograms, etc. All answers would be technically correct but some professors may mark off if your units don't match up.

Junwei Sun 4I
Posts: 125
Joined: Wed Oct 02, 2019 12:16 am

You can always convert moles to grams and vice versa so they should be the same.Pay attention to units though especially when you are doing percent yield (which is equal to (actual yield/theoretical yield)*100%) since you'll want units for actual yield and theoretical yield to be the same in this calculation.

Goyama_2A
Posts: 107
Joined: Sat Aug 24, 2019 12:17 am