1. What is Rate Constant of Zero Order Reaction?

Definition: The rate constant (k₀) for a zero-order reaction is the proportionality constant that relates the rate of reaction to the reactant concentration.

Purpose: This calculator determines the rate constant for zero-order reactions in chemical kinetics, particularly for reactions followed by first-order processes.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( k_0 \) — Rate constant for zero-order reaction (mol/m³·s)
• \( C_{A0} \) — Initial concentration of reactant (mol/m³)
• \( C_A \) — Current reactant concentration (mol/m³)
• \( \Delta t \) — Time interval (seconds)

Explanation: The rate constant is calculated by dividing the change in concentration by the time interval.

3. Importance of Rate Constant Calculation

Details: Determining the rate constant is essential for understanding reaction kinetics, predicting reaction rates, and designing chemical reactors.

4. Using the Calculator

Tips: Enter the initial concentration, current concentration, and time interval. All values must be positive, and initial concentration must be greater than current concentration.

5. Frequently Asked Questions (FAQ)

Q1: What is a zero-order reaction?
A: A zero-order reaction is one where the rate is independent of the reactant concentration.

Q2: What are typical units for k₀?
A: The rate constant has units of concentration per time (e.g., mol/m³·s or M/s).

Q3: When would I use this calculation?
A: When studying reaction kinetics where the initial step follows zero-order kinetics.

Q4: How does temperature affect k₀?
A: Like all rate constants, k₀ typically increases with temperature according to the Arrhenius equation.

Q5: Can k₀ be negative?
A: No, rate constants are always positive values. A negative result indicates incorrect input values.