1. What is pH Calculation?

pH calculation is a fundamental concept in chemistry that measures the acidity or basicity of a solution. The pH scale ranges from 0 to 14, with lower values indicating acidic solutions and higher values indicating basic solutions.

2. How Does the Calculator Work?

The calculator uses the pH formula:

Where:

• \( [H^+] \) — Hydrogen ion concentration (mol/L)
• \( \log \) — Base-10 logarithm function

Explanation: The pH value is calculated as the negative logarithm (base 10) of the hydrogen ion concentration in a solution.

3. Importance of pH Calculation

Details: pH calculation is essential in various fields including chemistry, biology, environmental science, and medicine. It helps determine the acidity or alkalinity of substances, which affects chemical reactions, biological processes, and environmental conditions.

4. Using the Calculator

Tips: Enter the hydrogen ion concentration in mol/L. The value must be greater than 0. The calculator will compute the corresponding pH value using the logarithmic relationship.

5. Frequently Asked Questions (FAQ)

Q1: What does pH stand for?
A: pH stands for "power of hydrogen" or "potential of hydrogen" and represents the concentration of hydrogen ions in a solution.

Q2: What is a neutral pH value?
A: A pH of 7 is considered neutral at 25°C, which is the pH of pure water.

Q3: How do I calculate pH without a calculator?
A: While it's possible to estimate pH using logarithm tables, using a scientific calculator with a log function is the most accurate and convenient method.

Q4: What is the relationship between pH and pOH?
A: pH + pOH = 14 at 25°C, where pOH is the negative logarithm of the hydroxide ion concentration.

Q5: Can pH values be negative or greater than 14?
A: Yes, for extremely concentrated acids, pH can be negative, and for extremely concentrated bases, pH can exceed 14, though these are rare in typical applications.