How is pH calculated using pOH at 25 degrees Celsius?

At 25 degrees Celsius, the relationship between pH and pOH is governed by the equation that states the sum of pH and pOH in a neutral solution equals 14. This relationship arises from the ion product of water at this temperature, which defines the concentration of hydrogen ions (H⁺) and hydroxide ions (OH⁻) in pure water.

To find pH from pOH, you rearrange the equation that describes their relationship. Since the total must equal 14, we have:

pH + pOH = 14

Rearranging this to solve for pH gives:

pH = 14 - pOH

This can also be expressed as pH = 14.00 - pOH, which is consistent with the choice selected. This understanding is essential in acid-base chemistry as it allows one to convert between the two measures easily, facilitating pH calculations when given pOH and vice versa.

When performing calculations involving pH and pOH, it's crucial to remember this fundamental relationship, especially in contexts like titrations or when dealing with buffer solutions where the balance of hydroxide and hydrogen ions plays a significant role.