Which of these correctly defines the poh of a solution?
the log of the hydronium ion concentration
the negative log of the hydronium ion concentration
the log of the hydroxide ion concentration
the negative log of the hydroxide ion concentration

I believe it is D) the negative log if the hydrixide ion concentration

The correct answer is:

The negative log of the hydroxide ion concentration.

Explanation:

The pOH is a standard of hydroxide ion (OH-) concentration. pOH is a step of the alkalinity of a solution. Aqueous solutions at 25°C with pOH less than 7 are alkaline, pOH greater than 7 are acidic and pOH equal to 7 are neutral.pOH scale can be determined as follows

pOH = -log[OH⁻]

[OH⁻] is the hydroxide ion concentration,therefore pOH is the negative log of the hydroxide ion concentration