Calculadora de Rendimento Teórico

Rendimento teórico = mol_reagente_limitante × razão_estequiométrica × M_produto.
Created by
Renato Passos, Eng. de Software
Reviewed by
Renato Passos, Eng. de Software

Last updated: Apr 18, 2026

Rendimento teórico
88,00 g

Formula

Y_teo = n_limitante × razão × M_produto

About this calculator

The Theoretical Yield Calculator determines the maximum amount of product that can be formed in a chemical reaction, considering the limiting reagent. It uses the moles of the limiting reagent, the stoichiometric ratio between the limiting reagent and the product, and the molar mass of the product. The result is expressed in grams, representing the theoretical yield, i.e., the ideal amount of product if the reaction had 100% efficiency and no losses.

To use the calculator, enter the moles of the limiting reagent, the stoichiometric ratio (coefficient of product divided by coefficient of limiting reagent in the balanced equation), and the molar mass of the product. The formula applied is: theoretical yield = moles of limiting reagent × stoichiometric ratio × molar mass of product. For example, in the reaction 2H₂ + O₂ → 2H₂O, if H₂ is the limiting reagent with 2 moles, the ratio is 1 (2 moles H₂O / 2 moles H₂) and the molar mass of water is 18 g/mol, the theoretical yield is 2 × 1 × 18 = 36 g of water.

This tool is essential for chemists, students, and professionals who need to predict the amount of product in syntheses, industrial reactions, or laboratory experiments. It aids in reaction planning, efficiency calculation (percent yield), and resource optimization. It is especially useful when working with expensive or limited reagents, allowing estimation of maximum possible utilization.

Important precautions: the calculator assumes the reaction goes to completion with no side reactions or losses. The chemical equation must be correctly balanced, and the limiting reagent must be accurately identified. Also, the molar mass must be entered correctly (usually in g/mol). Remember that theoretical yield is an ideal value; actual yield is often lower due to factors such as reagent purity, reaction conditions, and losses during product separation.

Frequently asked questions

What is theoretical yield?

It is the maximum amount of product that can be obtained from a chemical reaction, assuming all limiting reagent is converted to product with no losses.

How do I identify the limiting reagent?

Compare the amount of each reactant available with the stoichiometric ratio from the balanced equation. The reactant that produces the least product is the limiting reagent.

Does the calculator work for reactions with more than two reactants?

Yes, but you first need to identify the limiting reagent among all reactants and input its moles and the corresponding stoichiometric ratio.

Can I use the calculator for reactions in solution?

Yes, as long as you know the concentration and volume to calculate the moles of the limiting reagent. The calculator does not automatically convert concentration to moles.

Is theoretical yield always equal to actual yield?

No. Actual yield is usually lower due to losses, incomplete reactions, or impurities. Theoretical yield is the maximum possible value.

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