1. What is Concentration of Base in Basic Buffer?

Definition: This calculator determines the concentration of base in a basic buffer solution using Henderson's equation.

Purpose: It helps chemists and students calculate the base concentration needed to maintain a specific pH in buffer solutions.

2. How Does the Calculator Work?

The calculator uses Henderson's equation for basic buffers:

Where:

• \( C_{base} \) — Concentration of base (mol/m³)
• \( C_{salt} \) — Concentration of salt (mol/m³)
• \( pOH \) — Negative log of hydroxyl concentration
• \( pKb \) — Negative log of base ionization constant

Explanation: The equation relates the concentrations of the weak base and its conjugate acid (salt) to the pOH and pKb values.

3. Importance of Buffer Calculations

Details: Accurate buffer calculations are essential for maintaining stable pH conditions in chemical reactions, biological systems, and industrial processes.

4. Using the Calculator

Tips: Enter the salt concentration in mol/m³, pOH value, and pKb value. All values must be valid (salt concentration > 0).

5. Frequently Asked Questions (FAQ)

Q1: What is a basic buffer?
A: A basic buffer consists of a weak base and its conjugate acid (salt), which resists changes in pH when small amounts of acid or base are added.

Q2: How do I determine pOH?
A: pOH can be calculated from pH using the relation: pOH = 14 - pH (at 25°C).

Q3: Where can I find pKb values?
A: pKb values are typically found in chemistry reference tables or can be calculated from Kb (pKb = -log(Kb)).

Q4: What units should I use?
A: The calculator uses mol/m³ for consistency, but you can convert from mol/L (M) by multiplying by 1000 (1 M = 1000 mol/m³).

Q5: Can this be used for acidic buffers?
A: No, this calculator is specifically for basic buffers. For acidic buffers, use the Henderson-Hasselbalch equation with pKa.