1. What is Ratio of Products B to C in Parallel Reactions?

Definition: This calculator determines the ratio of product B to product C formed in two parallel first-order reactions from the same reactant.

Purpose: It helps chemists and chemical engineers predict product distribution in competing parallel reactions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( k_1 \) — Rate constant for reaction forming product B (s⁻¹)
• \( k_2 \) — Rate constant for reaction forming product C (s⁻¹)

Explanation: The ratio of products formed in parallel reactions is equal to the ratio of their respective rate constants.

3. Importance of Product Ratio Calculation

Details: Understanding product distribution helps in reaction optimization, selectivity control, and process design in chemical industries.

4. Using the Calculator

Tips: Enter the rate constants for both parallel reactions in reciprocal seconds (s⁻¹). Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: Does this apply to all parallel reactions?
A: This applies specifically to first-order parallel reactions from the same reactant.

Q2: How do I determine the rate constants?
A: Rate constants are typically determined experimentally through kinetic studies.

Q3: What if the reactions have different orders?
A: The simple ratio formula doesn't apply - more complex kinetic analysis is needed.

Q4: Does temperature affect this ratio?
A: Yes, since rate constants are temperature-dependent via the Arrhenius equation.

Q5: Can I use this for enzyme kinetics?
A: Only if the parallel reactions follow first-order kinetics with respect to the substrate.