Equilibrium Constant Calculator is a free tool that determines the equilibrium constant of a reversible chemical reaction easily. It just takes the coefficient, concentration of both reactants and products of the reaction as input and produces the equilibrium constant as output in a fraction of seconds.
Steps to Find Equilibrium Constant
The following are the detailed steps to calculate the equilibrium constant of a chemical reaction. Follow them to obtain instant results.
- Get the initial concentrations, coefficients of the reactants and products.
- Find the molar concentration to the power of coefficient for all the products, reactants.
- Multiply the product values together and reactants values together.
- Divide the multiplication of products by the reactants to get the equilibrium constant value.
What is the Equilibrium Constant?
In a reversiblre reaction both forward reaction and backward reaction occurs at the same time. After certain amount of time an equilibrium is formed, here the rate of reactants turned into products is equal to the rate of products turned into reactants. At this point of time, the reaction is considered to remain constant.
A reversible reaction can be in the form of a[A] + b[B] ⇌ c[C] + d[D]
The equilibrium constant doesn't depend on the initial concentrations of the reactants and products. It depends on the temperature, solvent and ionic strength.
Equilibrium Constant Equation
The equilibrium constant of a chemial reaction relates the all the species of the reaction.
The equilibrium constant equation is along the lines:
K = ([C]c * [D]d)/([B]b * [A]a)
[A], [B] are the molar concentrations of the reactants
[C], [D] are the molar concentrations of the products
K is the equilibrium constant
Kc is the conentration
Kp is a function of both reactants and products partial pressure
If K > 1 means the equilibrium favours the products
If K < 1 means the equilibrium favours the reactants
If K = 1 means the mixture contains similar amounts of both reactants and products at equilibrium
Question: What is the equilibrium constant for the reaction 2SO₂ + O₂ ⇌ 2SO₃?
Given chemical reaction is 2SO₂ + O₂ ⇌ 2SO₃
The equilibrium constant equation for this reaction is K = 2[SO₃]²/(2[SO₂]² * [O₂])
The reactants and products concentrations at the state of equilibrium position follows:
SO₂: 0.03 mol/L
O₂: 0.035 mol/L
SO₃: 0.5 mol/L
K = (2 * 0.5)²/((2 * 0.03)² * 0.035)
= 1/(0.0036 * 0.035)
Here K > 1, the equilibrium favours the products.
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Frequently Asked Question's on Equilibrium Constant Calculator
1. How to calculate the equilibrium constant on a calculator?
Enter the concentration and coefficient of each and every product and reactant in the chemical reaction in the provided input fields. Press the calculate button to get the equilibrium constant in the output section along with the step by step explanation.
2. What is the equilibrium constant calculator?
The equilibrium constant calculator is helpful to understand the reversible reactions when forward and backward reactions occur simultaneously. This tool finds the equilibrium constant after the reaction reaches the state of equilibrium.
3. What does the equilibrium constant depend on?
The equilibrium constant depends on the coefficients, concentration of the reactants and products of the reversible reaction.
4. Why is equilibrium constant useful?
The equilibrium constant is used to understand the biochemical processes like oxygen transport by haemoglobin or acid-base homeostasis in humans. Doctors will check the equilibrium constant of transferrin in blood because it is a symptom of iron deficiency.