1. What is pH of Mixture of Two Strong Acids?

Definition: This calculator determines the pH of a mixture of two strong acid solutions based on their normalities and volumes.

Purpose: It helps chemists and students quickly calculate the resulting pH when mixing two acidic solutions.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( pH \) — Negative log of hydronium concentration
• \( N_1 \) — Normality of solution 1 (eq/L)
• \( V_1 \) — Volume of solution 1 (L)
• \( N_2 \) — Normality of solution 2 (eq/L)
• \( V_2 \) — Volume of solution 2 (L)

Explanation: The formula calculates the weighted average concentration of H+ ions from both solutions, then takes the negative logarithm to determine pH.

3. Importance of pH Calculation

Details: Accurate pH calculation is crucial for chemical reactions, biological systems, and industrial processes where pH affects reaction rates and product quality.

4. Using the Calculator

Tips: Enter the normality and volume for both acid solutions. Default values are provided as examples. All volumes must be > 0.

5. Frequently Asked Questions (FAQ)

Q1: What is normality?
A: Normality (N) is the number of gram equivalents of solute per liter of solution, which for acids equals the molarity multiplied by the number of H+ ions donated.

Q2: Does this work for weak acids?
A: No, this calculator is specifically for strong acids that completely dissociate. Weak acids require additional calculations.

Q3: What units should I use?
A: Normality in equivalents per liter (eq/L) and volume in liters (L). Convert other units before input.

Q4: What if I mix more than two acids?
A: The formula can be extended: pH = -log[(N1V1 + N2V2 + N3V3 + ...)/(V1 + V2 + V3 + ...)]

Q5: Why does mixing two acids give a different pH than either alone?
A: The resulting pH depends on the combined H+ concentration, which is a volume-weighted average of the two solutions.