1. What is Number of Moles of Reactant Reacted?

Definition: This is the amount of reactant consumed in the reaction at a certain instant of time.

Purpose: It helps chemists and chemical engineers determine how much reactant is being used to form a specific product at any point during a reaction.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( dR \) — Moles of reactant reacted (moles)
• \( dP \) — Moles of product formed (moles)
• \( \phi \) — Instantaneous fractional yield (dimensionless, between 0 and 1)

Explanation: The moles of product formed is divided by the instantaneous fractional yield to determine how much reactant was actually consumed to produce that amount of product.

3. Importance of This Calculation

Details: Understanding reactant consumption helps in reaction optimization, process design, and determining reaction efficiency at different stages.

4. Using the Calculator

Tips: Enter the moles of product formed and the instantaneous fractional yield (default 0.6). The fractional yield must be between 0 and 1.

5. Frequently Asked Questions (FAQ)

Q1: What is instantaneous fractional yield?
A: It's a measure of how selective a particular reactant is in forming a particular product at a specific instant during the reaction.

Q2: How is this different from overall yield?
A: Instantaneous yield measures selectivity at a specific moment, while overall yield considers the entire reaction process.

Q3: When would the fractional yield be 1?
A: When 100% of the reactant is being converted to the desired product at that instant (perfect selectivity).

Q4: Can the fractional yield change during a reaction?
A: Yes, it often varies as reaction conditions and concentrations change over time.

Q5: What units are used for these calculations?
A: Moles for both reactant and product quantities, while fractional yield is dimensionless.