Hydrogen Ion Concentration Calculator from pH and pOH
The Hydrogen Ion Concentration Calculator is a versatile tool designed to facilitate the calculation of the hydrogen ion concentration ([H+]) in a solution based on the given pH or pOH values.
This calculator is instrumental in understanding the basic principles of acid-base chemistry and provides insights into the alkalinity or basicity of a solution.
Welcome to the Hydrogen Ion Concentration Calculator
How to Use the Calculator?
Input Selection: Users have the flexibility to input either the pH or pOH value, choosing the appropriate selection from the dropdown menu.
Data Entry: Enter the pOH or pH value into the designated field.
Calculation: Upon clicking the “Calculate” button, the calculator swiftly processes the input and computes the corresponding [H+] concentration and displays it along with the associated pH or pOH value.
Measuring Hydrogen Ion Concentration from pOH and pH
Relationship between pH, pOH, and Hydrogen Ion Concentration: The hydrogen ion concentration ([H+]) in a solution can be calculated using the given pH or pOH values. Understanding the relationship between these parameters is fundamental:
pH and pOH Relationship: In an aqueous solution at 25°C, the sum of pH and pOH is always 14. This relationship remains constant due to the auto-ionization of water.
pH + pOH = 14
Calculating Hydrogen Ion Concentration [H+] from pH
Given the pH value, the hydrogen ion concentration can be determined using the formula:
From pH Equation: If the pH of a solution is known, the [H+] concentration can be calculated.
pH = -log[H+]
Example: For a solution with a pH of 4.3:
- Using the pH equation:
- pOH = 4.3
- -log[H+] = 4.3
- [H+] = 5.01 × 10-5 M
Calculating Hydrogen Ion Concentration [H+] from pOH
Similarly, [H+] can be calculated when the pOH is given using the relationship between pH and pOH:
From pH Equation: If the pOH of a solution is provided, the [H+] concentration can be deduced.
- pH + pOH = 14
- pH = 14 – pOH
Example: For a solution with a pOH of 5.6:
- Using the pH + pOH equation:
- pH + pOH = 14
- pH + 5.6 = 14
- pH = 14 – 5.6
- pH = 8.40
Further Calculation:
From the pH equation:
- pH = 8.40
- -log[H+] = 8.40
- [H+] = 3.98 × 10-9 M