Percent Yield

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Lauren Lewis3L
Posts: 57
Joined: Wed Feb 20, 2019 12:16 am

Percent Yield

Postby Lauren Lewis3L » Sun Oct 13, 2019 8:31 pm

Can someone please explain percent yield to me! I am confused on how to get the actual value versus the theoretical from the equation.

Maya Serota 3G
Posts: 53
Joined: Tue Sep 24, 2019 12:17 am

Re: Percent Yield

Postby Maya Serota 3G » Sun Oct 13, 2019 8:34 pm

The actual value will be given to you in the question. From there the equation for percent yield is (theoretical/actual) x 100.

rachelle1K
Posts: 109
Joined: Sat Sep 07, 2019 12:16 am

Re: Percent Yield

Postby rachelle1K » Sun Oct 13, 2019 8:37 pm

actual yield is usually given within the problem.

theoretical yield is found by multiplying the limiting reactant by the molar mass, molar ratio to the product, and then the product by the molar mass to get your theoretical yield of the reaction. You multiply using the limiting reactant because that determines the amount of product that can actually produced.

By dividing actual over theoretical times 100, you get the percent 'efficiency' of the reaction, meaning how much it produced the maximum amount of product.

DesireBrown1J
Posts: 98
Joined: Wed Sep 18, 2019 12:18 am

Re: Percent Yield

Postby DesireBrown1J » Sun Oct 13, 2019 8:38 pm

Maya Serota 3G wrote:The actual value will be given to you in the question. From there the equation for percent yield is (theoretical/actual) x 100.



Sorry, but the percent yield would be the actual amount over the theoretical amount. So, (actual yield/theoretical yield)x100%.

Betania Hernandez 2E
Posts: 107
Joined: Fri Aug 02, 2019 12:15 am

Re: Percent Yield

Postby Betania Hernandez 2E » Sun Oct 13, 2019 8:53 pm

Actual yield is usually given in the problem if you are trying to find percent yield. Also, theoretical yield is usually less than the actual yield due to impurities or other side reactions that occur.

Jose Robles 1D
Posts: 100
Joined: Fri Aug 02, 2019 12:15 am

Re: Percent Yield

Postby Jose Robles 1D » Sun Oct 13, 2019 11:09 pm

Usually you solve for the theoretical yield using the limiting reactant, which is then divided by the actual yield, then multiplied by 100%. The actual yield is usually given.

kristi le 2F
Posts: 102
Joined: Thu Jul 11, 2019 12:15 am

Re: Percent Yield

Postby kristi le 2F » Fri Oct 25, 2019 11:52 pm

Normally, the higher the percent yield (the closer to 100%), the better the experiment because that means not much reaction was stuck to the side or involved in side reactions.


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