pOH Calculator
Calculate pOH from hydroxide ion concentration. Convert between pH and pOH values.
Input Values
Calculate pOH from:
Key Relationships:
- pH + pOH = 14 (at 25C)
- pOH = -log[OH-]
- [H+] x [OH-] = Kw = 10^-14
pOH
4.0000
Basic/Alkaline - Weak Base
pH
10.0000
[OH-]
1.0000e-4
[H+]
1.0000e-10
Kw (ion product)
1.0000e-14
pOH Scale:
0 (Strong Base)7 (Neutral)14 (Strong Acid)
About pOH
pOH is a measure of hydroxide ion concentration in a solution, similar to how pH measures hydrogen ion concentration. At 25C, pH + pOH = 14. A low pOH indicates a basic (alkaline) solution with high hydroxide concentration, while a high pOH indicates an acidic solution. Understanding pOH is essential for working with bases and buffer solutions.