1. What is the Sulfuric Acid pH Formula?

The pH formula for sulfuric acid (H₂SO₄) is pH = -log(2C), where C represents the molar concentration of the acid. This formula accounts for the complete dissociation of sulfuric acid, which is a strong diprotic acid.

2. How Does the Calculator Work?

The calculator uses the sulfuric acid pH formula:

Where:

• \( C \) — Concentration of sulfuric acid (mol/L)
• 2 — Factor accounting for complete dissociation of both protons
• log — Base-10 logarithm

Explanation: Sulfuric acid is a strong acid that completely dissociates, releasing two protons per molecule, hence the factor of 2 in the formula.

3. Importance of pH Calculation

Details: Accurate pH calculation is essential for chemical reactions, industrial processes, laboratory work, and understanding acid-base properties in various applications.

4. Using the Calculator

Tips: Enter the concentration of sulfuric acid in mol/L. The value must be valid (concentration > 0).

5. Frequently Asked Questions (FAQ)

Q1: Why is there a factor of 2 in the formula?
A: Sulfuric acid is diprotic and completely dissociates, releasing two protons (H⁺ ions) per molecule, hence the factor of 2.

Q2: What is the pH range for sulfuric acid solutions?
A: The pH can range from negative values (for very concentrated solutions) to near 7 (for very dilute solutions).

Q3: Does this formula work for all concentrations?
A: This formula provides a good approximation for most concentrations, but for very concentrated solutions, activity coefficients may need to be considered.

Q4: How does temperature affect pH calculation?
A: While the dissociation is complete, the autoionization constant of water (K_w) changes with temperature, which may affect very dilute solutions.

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