Calculate the hydroxide ion concentration of a solution with ph=3.25. show all calculations leading to an answer. need show work i will rank brainiest

             [OH⁻]  =  1.77 × 10⁻¹¹ M

Solution:
              In order to calculate concentration of hydroxide ion i.e. [OH⁻] first we will find the pOH by using following relation,

                                        pH  +  pOH  =  14

Putting value of pH given and solving for pOH,

                                        3.25  +  pOH  =  14

                                        pOH  =  14  -  3.25

                                        pOH  =  10.75

As ,
                                        pOH  =  -log [OH⁻]
So,
                                        [OH⁻]  =  10^-pOH

Putting value of pOH,

                                        [OH⁻]  =  10⁻¹⁰·⁷⁵

                                        [OH⁻]  =  1.77 × 10⁻¹¹ M