What is the Yield?
In chemistry, The amount of product we get in a chemical reaction is called yield or reaction yield. The yield also deals with
- Absolute Yield
- Percentage Yield
- Theoretical Yield
What is Percent Yield?
The percent ratio of an actual yield to the theoretical yield is called as percent yield definition or percentage yield. Percentage yield is usually lower than 100%.
What is Percent Yield Formula?
The percent yield formula is as the percent yield is equals to the actual yield, divided by theoretical yield and multiphy by 100%.
The estimation requires you to provide two of the three variables, but it doesn't matter which two! Like any other equation, it can be readjusted to find the required variable.
Don’t worry, this is made easy as we've made percent yield calculator; just enter the two known variables to find the unknown within a fraction. Before using, do balance your equation with Chemical Equation Balancer Calculator.
Significance of Percent Yield
Percent yield is quite significant in manufacturing different products. Let’s consider the process for making a drug called “Aspirin”. It has only a yield of 1%, it means the process is inefficient.
It is described as the proportion of the real to theoretical production. It explains the efficacy of a chemical reaction and is considered in different experiments like the simple decomposition of a compound.
In a nutshell, the percent yield calculator tells you the accuracy of your experiment. Let’s suppose an ideal condition, your proportional yield would be 100%.
Above mentioned situation is idealized, it’s practically impossible to have 100% yield, If it is 100%, it means you still have solvents or some contaminants in your end product.
The proportional output will be less than 100% because of the difference between the actual and theoretical production.
Actual Yield vs Theoretical Yield
In comparison, the theoretical yield is the amount of product acquired through complete conversion of all the reactants into the final product, without any loss of reactant.
The actual yield is less than the theoretical yield, because only few reactions advances towards completion. Some part of the product is not recovered at the end of the reaction.
For instance, if you are recovering some precipitate of a product, you may lose other parts of it because of improper filtration. During the filtration process, some part of the product may not be sieved and left on the mesh paper.
Learn about what is theoretical yield and how to calculate theoretical yield with Theoretical Yield Calculator.
How to find Percent Yield?
To determine the yield and to calculate percent yield, you require two things, the actual yield and theoretical yield.
You will need to find the moles or concentration in grams of your reactants to find the theoretical yield. Make sure you convert the concentration to a single unit: either grams or moles. For fix that, you can use Grams to Moles Calculator before proceeding.
Let's consider you have both the values; how will you find the output?
- Know the weights of both values (same units)
- Divide the actual yield with the theoretical one.
- Now, multiply this value by 100 to get the answer.
That’s it, not too complex right! Or you could benefit from our smart percent yield calculator to find it easily and quickly.
An important point about the values obtained; it’s possible to have a value above 100% but is due to the presence of solvent in your sample as well as in your end product.
One solution is thorough drying of the product then reweigh it to get the true value. The right requirement is somewhere in 70-90% or more but never 100%.
Example of Calculating Percent Yield
Let’s assume that you are conducting a nucleophilic addition reaction, using acetone and sodium cyanide to produce hydroxyacetonitrile.
For now, just ignore the solvents below the arrow; you reacted 7g of acetone with 3g of cyanide, giving a hypothetical production of 8.54g of hydroxylacetonitrile.
Now if you carry out the experiment and get actual yield of 7.58g of hydroxylactenitrile, what will be the percent yield?
You have the required values as the actual yield is 7.58 g, and theoretical yield is 8.54g. Now use the following equation :
Percent yield = (Actual mass of desired product / Hypothetical mass) ×100
= (7.58 / 8.54)×100 = 88.75%
There it is: 88.75%. That was quite efficacious reaction! If you get a low output, check your half initial equation manually or use Half Life Calculator.
How to calculate Percent Yield with Percent Yield Calculator?
Learn how to calculate percentage yield easily. Our percent yield calculator uses percent yield equation & percent yield formula to give actual value of percent yield.
To calculate percent yield, do the following steps
- Put the value of theoretical yield
- Put the value of actual yield
- Press "Calculate"
Our percentage yield calculator will show you accurate results. If you want to check mole fraction, use our Mole Fraction Calculator.
We hope you liked our work, do give us feedback so we could constantly improve. Best of luck, Cheers!