1. What is the Equilibrium Constant?

The equilibrium constant (K) is a value that expresses the ratio of product concentrations to reactant concentrations at equilibrium, with each concentration raised to the power of its stoichiometric coefficient in the balanced chemical equation.

2. How Does the Calculator Work?

The calculator uses the equilibrium constant formula:

Where:

• \( [\text{Products}] \) — Concentration of products at equilibrium (mol/L)
• \( [\text{Reactants}] \) — Concentration of reactants at equilibrium (mol/L)

Explanation: The equilibrium constant quantifies the position of equilibrium. A large K (>1) favors products, while a small K (<1) favors reactants.

3. Importance of Equilibrium Constant

Details: The equilibrium constant is fundamental in chemical thermodynamics and kinetics. It helps predict reaction direction, extent of reaction, and is used to calculate other thermodynamic quantities.

4. Using the Calculator

Tips: Enter equilibrium concentrations of products and reactants in mol/L. Reactant concentration must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What does a K value of 1 mean?
A: A K value of 1 indicates that at equilibrium, the concentrations of products and reactants are equal.

Q2: How does temperature affect K?
A: The equilibrium constant is temperature-dependent. For endothermic reactions, K increases with temperature; for exothermic reactions, K decreases.

Q3: What are the units of K?
A: The equilibrium constant is dimensionless when using concentrations, as the units cancel out in the ratio.

Q4: Can K be negative?
A: No, equilibrium constants are always positive values since concentrations are always positive.

Q5: How is K different from Q?
A: K is the equilibrium constant at equilibrium conditions, while Q is the reaction quotient which can be calculated at any point during the reaction.