Chemistry Calculators ▶ Theoretical Yield Calculator
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This theoretical yield calculator is a tool for chemical reactions that calculate theoretical yield according to the theoretical yield formula. Calculating theoretical yield becomes easy with this yield calculator as it tells you how many grams of product the chemical reaction will generate.
Before performing chemical reactions, to get ease you should have to know how much product will be produced with given quantities of reactants. This is said to be as the theoretical yield. This is the phenomenon that use when calculating theoretical yield of a chemical reaction. The same phenomenon can take into account to calculate the amount of each reagent that needed to produce a desired amount of product.
Well, give a read to this article to know theoretical yield definition, theoretical yield equation, how to calculate theoretical yield along, about theoretical yield calculator, and much more!
So, let’s start with the theoretical yield definition – Read on!
In chemistry, theoretical yield is said to be the quantity of product, which obtained from the complete conversion of the limiting reactant in a chemical reaction. It is said to be the amount of product resulting from a perfect (theoretical) chemical reaction, and that’s why not as same as you will actually get from a reaction in the lab. However, theoretical yield can obtained under the perfect conditions, these conditions indicates where no product is lost in the process, means:
Remember that theoretical yield is commonly expressed in the terms of grams or moles! You can try the above theoretical yield calculator or use the below theoretical yield formula for calculating theoretical yield!
The theoretical yield equation used in finding theoretical yield from the mole of the limiting reagent, assuming 100 percent efficiency. So, no need to worry more about how to find theoretical yield, the given theoretical yield formula does work best for you!
mass of product = molecular weight of product * (moles of limiting reagent in reaction * stoichiometry of product)
The theoretical yield calculator will helps to estimate how many grams of product each reagent can produce, if fully consumed with no byproducts. This calculator helps you in calculating theoretical yield, limiting reagent (moles), and also stoichiometry of product by using theoretical yield equation.
You just have to stick to the following steps to calculate theoretical yield, read on!
About Limiting reagent:
About Desired Product:
Once you added all the above values, simply hit the calculate button, this smart calculator for theoretical yield shows:
Finding theoretical yield becomes easy by identifying the limiting reactant of a balanced chemical reaction. In order to calculate it, the first step is to balance the equation, if it’s unbalanced.
In very next step, you have to identify the limiting reactant (this all based on the mole ratio between the reactants. Remember that the limiting reactant is not found in excess, so the reaction cannot proceed, if once it is used up!
So, to find the limiting reactant, you need to:
To get the grams of product, you have to multiply the moles of each product by its molecular weight.
How to calculate theoretical yield of aspirin, an experiment in which you prepare acetylsalicylic acid (aspirin) from salicylic acid, and you know from the balanced equation for aspirin synthesis in which the mole ratio between the limiting reactant (salicylic acid) and the product (acetylsalicylic acid) is 1:1.
If you have 0.00153 moles of salicylic acid, then the theoretical yield is:
Theoretical yield = 0.00153 mol salicylic acid * (1 mol acetylsalicylic acid / 1 mol salicylic acid) * (180.2 g acetylsalicylic acid / 1 mole acetylsalicylic acid)
Theoretical Yield = 0.276 grams acetylsalicylic acid (aspirin)
A limiting reagent is said to be a chemical reactant that limits the amount of product that is formed. Moreover, the limiting reagent is the thing that gives the smallest yield of product calculated from the available reagents (reactants). This smallest yield of product is said to be theoretical yield.
Let’s solve it with the theoretical yield example!
According to the given balanced chemical equation, if 4.50 g of HCl are reacted with 15.00 g of CaCO3, then calculate the theoretical yield of carbon dioxide (CO2)!
2HCl + CaCO3 → CaCl 2 + H2O + CO2
1: At the first, you have to determine the number of moles of one of the products (CO2 in this example) produced if all of each reactant is used up
4.50 g HCl x 1mol HCl / 36.5 g HCl x 1molCO2/2mol HCl = 0.0616molCO
15.00 g CaCO3 x 1molCaCO3 / 100.1g CaCO3 x 1molCO2 / 1molCaCO3 = 0.1499 molCO2
2: Now, you ought to use the smallest number of moles of the product (CO2) from step 1 to calculating the theoretical yield of product (CO2).
0.0616 molCO2 x 44.0 g CO2 / 1molCO2 = 2.71g CO2
According to the equation given below, if 112 g of nitrogen gas reacts with hydrogen gas to generate 40.8 g of ammonia gas:
N2(g) + 3H2(g) ⇋ 2NH3(g)
Calculate the percentage and theoretical yield of ammonia:
1. Actual yield is said to be the mass of ammonia that is actually produce during the chemical reaction
Actual yield of ammonia (NH3) = 40.8 g (given in the above question)
2. Theoretical yield of ammonia (NH3) is said to be the mass of product predicted by the balanced chemical equation for the reaction.
By the balanced chemical equation the mole ratio that is stoichiometric ratio N2:NH3 is 1:2
Thus, moles NH3 = 2 × moles N2
Assuming all the available N2 reacts completely, then the maximum amount of ammonia (NH3) that can be produced is:
moles NH3 = 2 × (mass N2 ÷ molar mass N2) = 2 × (112 ÷ [2 × 14]) = 2 × (112 ÷ 28) = 8 mol
Theoretical yield NH3 = predicted mass NH3
Predicted mass NH3 = maximum mass of ammonia (NH3) that can be produced assuming that all the N2 reacts completely:
mass(NH3) = moles(NH3) × molar mass(NH3)
predicted mass NH3 = 8 × (14 + 3 × 1) = 8 × 17 = 136 g
Theoretical yield = predicted mass = 136 g
3. Percentage yield = (actual yield ÷ theoretical yield) × 100
Now, submitting the values for actual yield and theoretical yield into the above equation:
percentage yield NH3 = (40.8 ÷ 136) × 100 = 30%
The theoretical yield of Cl2 is 22.9 g
When it comes to find the theoretical yield, stick to the given steps:
Hope so, the above stuff about calculation of theoretical yield works best for you!
From a chem.libretexts – All about chemistry – Excess reagent, limiting reagent – Theoretical Yield – calculate theoretical yield
The source of oneclass offers ultimate solutions of Chemistry – how to calculate theoretical yield of aspirin
By GCSEOCR 21st Century – Calculating yields – OCR 21C – Calculate the maximum theoretical yield – Chemical Reaction Analysis