1. What is Initial Concentration of Weak Base?

Definition: This calculator determines the initial concentration of a weak base solution using its dissociation constant (K_b) and degree of dissociation (α).

Purpose: It helps chemistry students and professionals calculate the original concentration of a weak base before dissociation occurs.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( C_0 \) — Initial concentration (mol/m³)
• \( K_b \) — Dissociation constant of weak base
• \( \alpha \) — Degree of dissociation (between 0 and 1)

Explanation: The dissociation constant is divided by the square of the degree of dissociation to find the original concentration before any dissociation occurred.

3. Importance of Initial Concentration Calculation

Details: Knowing the initial concentration is crucial for preparing solutions, predicting reaction outcomes, and understanding acid-base equilibria.

4. Using the Calculator

Tips: Enter the dissociation constant (K_b) and degree of dissociation (α, between 0 and 1). Both values must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is the degree of dissociation?
A: It's the fraction of original solute molecules that dissociate into ions (ranges from 0 to 1).

Q2: What are typical K_b values for weak bases?
A: Weak bases typically have K_b values between 10^-2 and 10^-12.

Q3: Why does the formula use α squared?
A: The square accounts for the equilibrium expression where both the base and its conjugate acid are involved.

Q4: Can I use this for strong bases?
A: No, this formula only applies to weak bases that don't completely dissociate.

Q5: What units should I use?
A: The calculator uses consistent units (mol/m³), but you can convert results as needed.