pH and pOH Scales and Their Relationship
This video presents the same text shown beside it, spoken and on screen. It adds nothing the text does not say.
State
pH is the negative base-ten log of hydrogen ion concentration, pOH the same for hydroxide, and at 25 °C the two sum to 14.
Show
A solution with [H3O+] = 1.0 × 10⁻³ M has pH 3.00 and, at 25 °C, pOH 11.00.
Watch for
The pH-plus-pOH-equals-14 shortcut holds only at 25 °C, inherited from Kw's own temperature dependence.