1. What is Equilibrium Constant?

The equilibrium constant (Keq) is a numerical value that expresses the relationship between the amounts of products and reactants present at equilibrium in a reversible chemical reaction at a given temperature.

2. How Does the Calculator Work?

The calculator uses the equilibrium constant formula:

Where:

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

Explanation: The equilibrium constant quantifies the position of equilibrium. A large Keq indicates products are favored, while a small Keq indicates reactants are favored.

3. Importance of Keq Calculation

Details: Calculating equilibrium constants is essential for predicting the direction of chemical reactions, understanding reaction yields, and designing chemical processes in industrial and laboratory settings.

4. Using the Calculator

Tips: Enter concentrations in molarity (M). Products concentration must be ≥0, reactants concentration must be >0. Ensure concentrations are measured at equilibrium.

5. Frequently Asked Questions (FAQ)

Q1: What does a Keq value greater than 1 mean?
A: A Keq > 1 indicates that products are favored at equilibrium, meaning the reaction proceeds predominantly in the forward direction.

Q2: What does a Keq value less than 1 mean?
A: A Keq < 1 indicates that reactants are favored at equilibrium, meaning the reaction proceeds predominantly in the reverse direction.

Q3: How does temperature affect Keq?
A: Keq is temperature-dependent. For exothermic reactions, Keq decreases with increasing temperature; for endothermic reactions, Keq increases with temperature.

Q4: Can Keq be negative?
A: No, equilibrium constants are always positive values since they represent ratios of concentrations.

Q5: What are the units of Keq?
A: The units depend on the stoichiometry of the reaction. For this simplified calculation, we assume molarity (M) as the unit.