1. What is Reactant Concentration of Zero Order Reaction?

Definition: This calculator determines the remaining concentration of a reactant after a zero-order reaction has occurred for a specific time interval.

Purpose: It helps chemists and chemical engineers understand how reactant concentration changes over time in zero-order reactions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

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

Explanation: The product of rate constant and time is subtracted from the initial concentration to get the remaining concentration.

3. Importance of Reactant Concentration Calculation

Details: Understanding how reactant concentration changes over time is crucial for reaction optimization, process control, and safety in chemical processes.

4. Using the Calculator

Tips: Enter the initial concentration, rate constant, and time interval. All values must be positive (except rate constant can be zero).

5. Frequently Asked Questions (FAQ)

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

Q2: What happens if the calculated concentration is negative?
A: The calculator automatically sets negative results to zero, as concentrations can't be negative.

Q3: What are typical units for these calculations?
A: Concentration in mol/m³, rate constant in mol/m³·s, and time in seconds.

Q4: Can this be used for first-order reactions?
A: No, this is specifically for zero-order reactions. First-order reactions have a different rate equation.

Q5: What factors affect the rate constant?
A: Temperature, catalysts, and the nature of reactants influence the rate constant.