pH ↔️ pOH Calculator

Understanding the relationship between pH and pOH is essential for comprehending the acid-base properties of solutions. The pH scale is a measure of the acidity or alkalinity of an aqueous solution, while pOH provides complementary information by measuring the concentration of hydroxide ions.

pOH Formula

The interconversion between pH and pOH is governed by the simple formulas:

• To find pOH given pH: \( \text{pOH} = 14 - \text{pH} \)
• To find pH given pOH: \( \text{pH} = 14 - \text{pOH} \)

How to Calculate pOH?

1. Identify the given value: Determine whether you have the pH or pOH of the solution.
2. Use the appropriate formula: If you have the pH, use \( \text{pOH} = 14 - \text{pH} \). If you have the pOH, use \( \text{pH} = 14 - \text{pOH} \).
3. Calculate the result: Perform the subtraction to find the complementary value.

Example Calculation

If a solution has a pH of 3.5, the pOH can be calculated as follows: \[ \text{pOH} = 14 - 3.5 = 10.5 \]

This simple tool aids in swiftly switching between pH and pOH values, which is pivotal in studies related to chemistry and environmental science, such as understanding the acidity of rainwater or the alkalinity of natural water bodies.