percent yield

Moderators: Chem_Mod, Chem_Admin

bellaha4F
Posts: 104
Joined: Wed Sep 18, 2019 12:20 am

percent yield

Postby bellaha4F » Thu Oct 10, 2019 8:53 pm

should we always show the percent yields in the limiting reactant problems, or just when it's specifically asked?

405335722
Posts: 56
Joined: Fri Aug 30, 2019 12:16 am

Re: percent yield

Postby 405335722 » Thu Oct 10, 2019 8:55 pm

Hi!

You can only do percent yield problems if they give you the experimental data so if they give it to you I would do it just in case.

Remember percent yield is,

100(actual yield/theoretical yield)= percent yield.

Charysa Santos 4G
Posts: 107
Joined: Wed Sep 18, 2019 12:21 am

Re: percent yield

Postby Charysa Santos 4G » Fri Oct 11, 2019 1:13 pm

It depends on what you are given. They will usually ask for it, or if they give you the experimental data for something like a problem where you have to find the empirical formula, then you should calculate it to help you with the final answer.

Khushboo_3D
Posts: 60
Joined: Wed Sep 18, 2019 12:19 am

Re: percent yield

Postby Khushboo_3D » Fri Oct 11, 2019 1:49 pm

It depends on what's given to us. Usually to find the percent yield you would need the actual yield. Through limiting reaction problems, you can usually only find the theoretical yield.

jisulee1C
Posts: 149
Joined: Thu Jul 25, 2019 12:17 am

Re: percent yield

Postby jisulee1C » Fri Oct 11, 2019 2:35 pm

Usually the problem will ask specifically for the percentage yield and if it is not asked for then you don't need to calculate it.

Kallista McCarty 1C
Posts: 212
Joined: Wed Sep 18, 2019 12:18 am

Re: percent yield

Postby Kallista McCarty 1C » Fri Oct 11, 2019 2:43 pm

You only have to put it if they specifically ask for it in the question!

KMenjivar_3A
Posts: 25
Joined: Mon Jan 07, 2019 8:05 am

Re: percent yield

Postby KMenjivar_3A » Fri Oct 11, 2019 3:33 pm

No, limiting does associate with finding the percent yield; however, calculating the % yield is unnecessary unless the question specifically asks us to solve it.

ranqiao1e
Posts: 51
Joined: Sat Sep 14, 2019 12:15 am

Re: percent yield

Postby ranqiao1e » Fri Oct 11, 2019 4:27 pm

We only need to worry about percent yield when the problem asks us to do so. However, while doing experiments, we should always expect a difference between the theoretical and the actual

CynthiaLy4F
Posts: 103
Joined: Sat Jul 20, 2019 12:16 am

Re: percent yield

Postby CynthiaLy4F » Fri Oct 11, 2019 9:00 pm

You don't have to worry about finding the percent yield unless the question specifically asks for you to find it.

Nick Fiorentino 1E
Posts: 102
Joined: Wed Sep 18, 2019 12:16 am

Re: percent yield

Postby Nick Fiorentino 1E » Sat Oct 12, 2019 2:45 pm

I believe you only find the percent yield if it is asked in the question, but there may be some scenarios where you need it for a step in the problem. Also, questions don't always explicitly ask what they want you to find so be aware of that

Rebecca Remple 1C
Posts: 137
Joined: Wed Sep 18, 2019 12:16 am
Been upvoted: 1 time

Re: percent yield

Postby Rebecca Remple 1C » Sat Oct 12, 2019 3:06 pm

Hi Bella,

I agree with the previous posters that you do not have to show percent yield on limiting reactant problems. In fact, the yield you calculate using the limiting reactant would actually be the theoretical/maximum yield! Basically, the limiting reactant determines the maximum amount of product you can get, no matter how much of the excess reactant you have. For example, let's say that 1A + 2B -> 3C. If you have 1 mol of A, it doesn't matter if you have 2 or 200 mol B, because your maximum yield will always be 3 mol C. If you conducted this experiment using these exact measures of reactants and wound up with 2 mol C, then that would be the actual yield. In this case, the percent yield would be (2/3) * 100%, or about 66.67%. I hope this helps!

-Rebecca


Return to “Limiting Reactant Calculations”

Who is online

Users browsing this forum: No registered users and 2 guests