1. What is Mole Fraction of Reactant Substance B?

Definition: Mole fraction represents the number of molecules of component B in a mixture divided by the total number of moles in the given mixture.

Purpose: It helps chemists understand the composition of a mixture and predict reaction outcomes.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( x_B \) — Mole fraction of substance B
• \( \alpha \) — Degree of dissociation (between 0 and 1)

Explanation: The degree of dissociation is divided by (1 + degree of dissociation) to calculate the mole fraction of the dissociated component.

3. Importance of Mole Fraction Calculation

Details: Mole fraction is crucial for understanding solution properties, calculating partial pressures, and determining equilibrium constants.

4. Using the Calculator

Tips: Enter the degree of dissociation (α) between 0 (no dissociation) and 1 (complete dissociation). The calculator will compute the mole fraction of substance B.

5. Frequently Asked Questions (FAQ)

Q1: What is the range of possible values for mole fraction?
A: Mole fraction always ranges between 0 and 1, where 0 means no presence of substance B and 1 means pure substance B.

Q2: How does degree of dissociation relate to mole fraction?
A: Higher degree of dissociation leads to higher mole fraction of the dissociated species in the mixture.

Q3: Can I use this for multiple components?
A: This calculator is for binary systems. For multiple components, you would need to consider all mole fractions.

Q4: What's the difference between mole fraction and concentration?
A: Mole fraction is dimensionless and temperature-independent, while concentration depends on volume and temperature.

Q5: When would mole fraction be equal to degree of dissociation?
A: Only when the degree of dissociation approaches 0, as x_B ≈ α for very small α values.