Calculating Percent Yield: C₉H₈O₄ ± 5.8%

In summary, percent yield is a measure of the efficiency of a chemical reaction, calculated by dividing the actual yield by the theoretical yield and multiplying by 100%. It is calculated using the formula (actual yield / theoretical yield) x 100% and the ± 5.8% margin of error indicates the potential variation between actual and theoretical yield. It is important to calculate percent yield in order to assess the efficiency of a reaction and identify sources of error. Sources of error can include impurities, incomplete reactions, loss of product, and human error in measurement or recording. It is crucial to control and account for these factors to obtain an accurate percent yield.
  • #1
Saturnfirefly
11
0
*Actual yield of C₉H₈O₄: 0.11 g ± 5,8%
*Theoretical yield of C₉H₈O₄: 0.25 g

*Percent yield: (0.11/0.25)x100 = 43% ± 5,8%

Have I done anything wrong when taking the percent error down?
Help...=/
 
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  • #2
Thought this might help.
LowlyPion said:
When dealing with product and division uncertainty propagation I think you are using relative or percentage uncertainties, so the effect of a constant 2 with no uncertainty, should have no overall effect on the relative uncertainty of the result.
https://www.physicsforums.com/showthread.php?p=1883849#post1883849"
 
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  • #3
The equation to find % error is

(abs(theoretical - measured/actual)/theoretical)*100=%error

abs=absolute value
 

What is percent yield?

Percent yield is a measure of the efficiency of a chemical reaction, calculated by dividing the actual yield (the amount of product obtained) by the theoretical yield (the amount of product that should have been obtained based on stoichiometry) and multiplying by 100%.

How do you calculate percent yield?

Percent yield is calculated using the formula: (actual yield / theoretical yield) x 100%. The actual yield is the amount of product obtained from the reaction, while the theoretical yield is the amount of product that should have been obtained based on the balanced chemical equation.

What is the significance of ± 5.8% in this calculation?

The ± 5.8% indicates the margin of error for the percent yield calculation. This means that the actual yield may vary by up to 5.8% from the theoretical yield. This could be due to factors such as impurities, incomplete reactions, or human error.

Why is it important to calculate percent yield?

Calculating percent yield allows us to determine the efficiency of a chemical reaction and identify any sources of error. It also helps us to compare the actual results to the expected results and make adjustments to the experimental procedure if necessary.

What are some possible sources of error in calculating percent yield?

Sources of error in calculating percent yield can include impurities in reagents, incomplete reactions, loss of product during transfer or filtration, and human error in measurement or recording of data. It is important to carefully control and account for these factors in order to obtain an accurate percent yield.

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