Final answer:
The special relationship between pH and pOH at 25°C can be represented by the equation pH + pOH = 14.00.
Step-by-step explanation:
At 25°C, there is a special relationship between pH and pOH. The equation that can be derived from this relationship is pH + pOH = 14.00. This equation holds true for any aqueous solution at 25°C, and it is based on the fact that the product of the concentrations of H3O+ and OH- ions in water, known as Kw, is equal to 1.0 × 10-14 at this temperature. The pH and pOH scales represent the concentrations of H3O+ and OH- ions, respectively, and they are inversely related, meaning as pH increases, pOH decreases.