1. What is the Equilibrium Constant?

The equilibrium constant (Keq) is a numerical value that expresses the relationship between the concentrations of products and reactants in a chemical reaction at equilibrium. It indicates the extent to which a reaction proceeds to completion.

2. How Does the Calculator Work?

The calculator uses the equilibrium constant formula:

Where:

• \( K_{eq} \) — Equilibrium constant (unitless)
• \( [Products] \) — Concentration of products at equilibrium (M)
• \( [Reactants] \) — Concentration of reactants at equilibrium (M)

Explanation: The equilibrium constant is calculated by dividing the concentration of products by the concentration of reactants when the reaction has reached equilibrium.

3. Importance of Keq Calculation

Details: The equilibrium constant is fundamental in chemical thermodynamics and kinetics. It helps predict the direction of reactions, determine reaction yields, and understand chemical equilibria in various systems including industrial processes and biological systems.

4. Using the Calculator

Tips: Enter product concentration and reactant concentration in molarity (M). Both values must be positive, and reactant concentration must be greater than zero.

5. Frequently Asked Questions (FAQ)

Q1: What does a large Keq value indicate?
A: A large Keq value (Keq > 1) indicates that the reaction favors product formation, meaning the equilibrium lies to the right.

Q2: What does a small Keq value indicate?
A: A small Keq value (Keq < 1) indicates that the reaction favors reactants, meaning the equilibrium lies to the left.

Q3: Is Keq affected by temperature?
A: Yes, the equilibrium constant is temperature-dependent. Changes in temperature can shift the equilibrium position and alter the Keq value.

Q4: Can Keq be negative?
A: No, Keq cannot be negative since it represents a ratio of concentrations, which are always positive values.

Q5: How is Keq different from Q?
A: Keq is the equilibrium constant at equilibrium, while Q is the reaction quotient at any point in the reaction. Comparing Q to Keq indicates the direction the reaction will proceed.