Home
Back
PH Formula:
| From: | To: |
The pH calculation measures the acidity or alkalinity of a solution. It is defined as the negative base-10 logarithm of the hydrogen ion concentration [H+]. The pH scale ranges from 0 to 14, with lower values indicating acidity and higher values indicating alkalinity.
The calculator uses the pH formula:
Where:
Explanation: The formula calculates the pH by taking the negative logarithm (base 10) of the hydrogen ion concentration. This logarithmic scale allows for a wide range of concentrations to be represented on a manageable scale.
Details: pH measurement is essential in various fields including chemistry, biology, environmental science, and medicine. It helps in determining the acidity of solutions, which is crucial for chemical reactions, biological processes, and water quality assessment.
Tips: Enter the hydrogen ion concentration in mol/L. The value must be greater than 0. The calculator will compute the pH value, which will be displayed with two decimal places.
Q1: What is the range of pH values?
A: pH values range from 0 to 14. A pH of 7 is neutral, below 7 is acidic, and above 7 is alkaline.
Q2: How is pH related to hydrogen ion concentration?
A: pH is inversely related to hydrogen ion concentration. As [H+] increases, pH decreases, indicating higher acidity.
Q3: Can pH be negative or greater than 14?
A: Yes, though rare. Very high acid concentrations can yield negative pH, and very high alkaline concentrations can yield pH above 14.
Q4: Why use a logarithmic scale for pH?
A: The logarithmic scale compresses the wide range of hydrogen ion concentrations into a manageable 0-14 scale, making it easier to work with.
Q5: How accurate is the pH calculation?
A: The calculation is mathematically precise based on the input concentration. However, real-world measurements may require calibration and consideration of temperature and other ions.