What is the ph of a solution with a hydroxyl ion (oh-) concentration of 10-10 m?

PH is the potential of hydrogen, pH provides a measure of the concentration of hydrogen ion while pOH scale provides the concentration of OH - ions.

pH denotes the negative logarithm of concentration of hydrogen while pOH denotes the negative logarithm of the concentration OH - ions.

Therefore; in this case the pOH = - log (OH-)

= - log (10^-10)

= 10

If the pOH is 10 then the pH of the solution will be 4