1. What is the Equilibrium Constant?

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

2. How Does the Calculator Work?

The calculator uses the equilibrium constant formula:

Where:

• \( [products] \) — Concentrations of products at equilibrium (M)
• \( [reactants] \) — Concentrations of reactants at equilibrium (M)
• \( coefficients \) — Stoichiometric coefficients from balanced equation

Explanation: The equilibrium constant describes the position of equilibrium - K > 1 favors products, K < 1 favors reactants.

3. Importance of K Value Calculation

Details: The equilibrium constant is fundamental in predicting reaction direction, extent, and composition at equilibrium. It's essential for understanding chemical systems and designing industrial processes.

4. Using the Calculator

Tips: Enter concentrations in molarity (M) and corresponding stoichiometric coefficients as comma-separated values. Ensure concentrations are positive values and coefficients match the balanced chemical equation.

5. Frequently Asked Questions (FAQ)

Q1: What does a large K value indicate?
A: A large K value (K >> 1) indicates the reaction strongly favors products at equilibrium.

Q2: What does K = 1 mean?
A: K = 1 indicates that at equilibrium, the concentrations of products and reactants are such that their ratio equals 1.

Q3: Are concentrations always in molarity?
A: For Kc (concentration equilibrium constant), yes. For Kp (pressure equilibrium constant), partial pressures are used instead.

Q4: How does temperature affect K?
A: The equilibrium constant changes with temperature according to the van't Hoff equation. Exothermic reactions have decreasing K with increasing temperature.

Q5: What about solids and pure liquids?
A: Concentrations of solids and pure liquids are not included in equilibrium constant expressions as their activities are 1.