1. What is Distribution Coefficient of Solute?

Definition: The distribution coefficient of solute is defined as the concentration of solute in the extract phase divided by the concentration of solute in the raffinate phase.

Purpose: It measures how a solute distributes itself between two immiscible phases during liquid-liquid extraction processes.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( K_{Solute} \) — Distribution coefficient of solute (dimensionless)
• \( y_C \) — Mass fraction of solute in the extract phase
• \( x_C \) — Mass fraction of solute in the raffinate phase

Explanation: The ratio of solute concentrations between the two phases determines how the solute partitions between them.

3. Importance of Distribution Coefficient

Details: This coefficient is crucial for designing separation processes, predicting extraction efficiency, and optimizing solvent selection in chemical engineering applications.

4. Using the Calculator

Tips: Enter the mass fraction of solute in both extract and raffinate phases (values between 0 and 1). The raffinate fraction must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: What does a high distribution coefficient mean?
A: A high K value indicates the solute prefers the extract phase over the raffinate phase.

Q2: What's a typical range for distribution coefficients?
A: Values can range from near 0 (solute prefers raffinate) to very high numbers (solute strongly prefers extract).

Q3: How does temperature affect the distribution coefficient?
A: Temperature changes can significantly alter K values as solubility in each phase changes with temperature.

Q4: Can the distribution coefficient be less than 1?
A: Yes, when the solute prefers the raffinate phase (x_C > y_C), K will be less than 1.

Q5: Is this the same as partition coefficient?
A: They are similar concepts, but partition coefficient typically refers to specific systems (like octanol-water) while distribution coefficient is more general.