1. What is the pH Calculation for H₂SO₄?

The pH calculation for sulfuric acid (H₂SO₄) is based on the formula pH = -log(2C), where C is the concentration in mol/L. This assumes complete dissociation of H₂SO₄, providing [H⁺] ≈ 2C.

2. How Does the Calculator Work?

The calculator uses the pH formula:

Where:

• \( C \) — Concentration of H₂SO₄ (mol/L)
• \( 2C \) — Approximate [H⁺] concentration for fully dissociated H₂SO₄

Explanation: Sulfuric acid is a strong diprotic acid that fully dissociates, providing two H⁺ ions per molecule, hence the factor of 2 in the calculation.

3. Importance of pH Calculation

Details: Accurate pH calculation is essential for understanding acid strength, chemical reactions, industrial processes, and environmental monitoring where sulfuric acid is involved.

4. Using the Calculator

Tips: Enter the concentration of H₂SO₄ in mol/L. The value must be valid (concentration > 0). The calculator assumes complete dissociation of the acid.

5. Frequently Asked Questions (FAQ)

Q1: Why is there a factor of 2 in the formula?
A: H₂SO₄ is a diprotic acid that provides two H⁺ ions per molecule when fully dissociated, hence [H⁺] ≈ 2C.

Q2: Does this calculation assume complete dissociation?
A: Yes, this simplified formula assumes H₂SO₄ is fully dissociated, which is generally valid for dilute solutions.

Q3: What are typical pH values for sulfuric acid solutions?
A: pH values range from very acidic (near 0 for concentrated solutions) to mildly acidic for very dilute solutions.

Q4: Are there limitations to this calculation?
A: This calculation is less accurate for very concentrated solutions where complete dissociation doesn't occur and activity coefficients differ significantly from 1.

Q5: Can this calculator be used for other acids?
A: No, this specific calculator is designed for sulfuric acid. Other acids have different dissociation patterns and require different calculations.