Home
Back
pH Formula:
| From: | To: |
pH is a measure of the acidity or basicity of a solution. It is defined as the negative logarithm (base 10) of the hydrogen ion concentration. The pH scale ranges from 0 to 14, with 7 being neutral, values below 7 acidic, and values above 7 basic.
The calculator uses the pH formula:
Where:
Explanation: The formula calculates the negative base-10 logarithm of the hydrogen ion concentration to determine the acidity or basicity of a solution.
Details: pH calculation is essential in chemistry, biology, environmental science, and many industrial processes. It helps determine the acidity or basicity of solutions, which affects chemical reactions, biological functions, and environmental conditions.
Tips: Enter the hydrogen ion concentration in moles per liter (mol/L). The value must be greater than 0. The calculator will compute the corresponding pH value.
Q1: What is the range of pH values?
A: pH values range from 0 to 14, with 7 being neutral. Values below 7 are acidic, and values above 7 are basic.
Q2: How is pH measured experimentally?
A: pH can be measured using pH indicators, pH paper, or a pH meter. pH meters provide the most accurate measurements.
Q3: What is the relationship between pH and pOH?
A: pH and pOH are related by the equation: pH + pOH = 14 at 25°C. pOH is the negative logarithm of the hydroxide ion concentration.
Q4: Why is pH important in biological systems?
A: pH is crucial for maintaining homeostasis in biological systems. Enzymes, proteins, and cellular processes often require specific pH levels to function properly.
Q5: Can pH be negative or greater than 14?
A: Yes, pH can be negative for very strong acids (high H⁺ concentration) and greater than 14 for very strong bases (very low H⁺ concentration), though these are rare in typical conditions.