Backward Reaction Rate Constant Formula:
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Definition: The backward reaction rate constant for a 2nd order reaction is the proportionality constant relating the rate of the chemical reaction to the concentration of reactants or products in a backward reaction.
Purpose: It helps chemists and chemical engineers understand and predict the behavior of reversible chemical reactions at equilibrium.
The calculator uses the formula:
Where:
Explanation: The formula calculates the backward rate constant based on the forward rate constant and the equilibrium concentrations of the reactants.
Details: Understanding both forward and backward rate constants is crucial for predicting reaction behavior, designing chemical reactors, and optimizing reaction conditions.
Tips: Enter the forward rate constant, initial concentrations of both reactants, and the equilibrium concentration. All values must be positive numbers.
Q1: What units should I use for concentrations?
A: The calculator uses mol/m³ for all concentration values. Convert your units if necessary.
Q2: Can this calculator be used for first-order reactions?
A: No, this formula is specific for second-order reactions. First-order reactions have a different relationship.
Q3: What if my equilibrium concentration is zero?
A: The equilibrium concentration must be greater than zero for the calculation to work (division by zero is undefined).
Q4: How accurate is this calculation?
A: The calculation is mathematically exact for ideal second-order reactions following this mechanism.
Q5: What if (A₀ - xeq) or (B₀ - xeq) is negative?
A: This would indicate an error in input values, as equilibrium concentration cannot exceed initial concentrations.