Question

Calculate the ph of 0.001m naoh by

Answer 1

the answer for your questioin is
[OH–] = 0.001 M.
pOH =–log(0.001) = 3
and pH = 14 – pOH = 14 – 3 = 11

Answer 2

Since [H]×[OH]=10^-14
[H]×[10^-3]=10^-14
[H]=10^-11
From here you can calculate pH which will be 11