1. What is Molarity from pH Calculation?

The molarity from pH calculation determines the concentration of hydrogen ions (H⁺) in a solution based on its pH value. For strong acids that completely dissociate in water, this directly gives the acid's molar concentration.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( M \) — Molarity (mol/L)
• \( pH \) — Negative logarithm of hydrogen ion concentration

Explanation: The pH scale is logarithmic, so each whole pH value below 7 is ten times more acidic than the next higher value. For strong acids, the molarity equals the hydrogen ion concentration.

3. Importance of pH to Molarity Conversion

Details: Converting pH to molarity is essential for preparing solutions with precise concentrations, chemical reactions, and understanding acid strength in laboratory and industrial settings.

4. Using the Calculator

Tips: Enter the pH value (typically between 0-14 for aqueous solutions). The calculator will output the molarity in both decimal and scientific notation.

5. Frequently Asked Questions (FAQ)

Q1: Does this work for all acids?
A: No, this calculation is only accurate for strong acids that completely dissociate. Weak acids require additional information about their dissociation constant (Ka).

Q2: What's the relationship between pH and molarity?
A: pH is the negative base-10 logarithm of the hydrogen ion molarity: pH = -log[H⁺]. For strong acids, [H⁺] equals the acid's molarity.

Q3: What are common strong acids?
A: Hydrochloric acid (HCl), sulfuric acid (H₂SO₄), nitric acid (HNO₃), and perchloric acid (HClO₄) are common strong acids.

Q4: Why is scientific notation often used?
A: Because pH values produce very small numbers (e.g., pH 3 = 0.001 M), scientific notation makes them easier to read and compare.

Q5: How accurate is this calculation?
A: The calculation is mathematically precise, but actual solution concentrations may vary due to measurement errors or incomplete dissociation.