what will be the pH of a solution NaOH with the concentration 2,2.10mol
Do you mean 2.10 M? If so then
pOH = -log(2.10) and
pH + pOH = pKw = 14
With pOH and pKw you can solve for pH.
pOH = -log(2.10) and
pH + pOH = pKw = 14
With pOH and pKw you can solve for pH.