Reactant Concentration Formula:
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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.
The calculator uses the formula:
Where:
Explanation: The product of rate constant and time is subtracted from the initial concentration to get the remaining concentration.
Details: Understanding how reactant concentration changes over time is crucial for reaction optimization, process control, and safety in chemical processes.
Tips: Enter the initial concentration, rate constant, and time interval. All values must be positive (except rate constant can be zero).
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.