pH + pOH = 14 1. 14-12.2= 1.8pOH pOH = -log(kb) Kb = 10^-1.8 2. -log(6.3*10^-5) = pOH pOH = 4.2 Solution pH + pOH = 14 1. 14-12.2= 1.8pOH pOH = -log(kb) Kb = 10^-1.8 2. -log(6.3*10^-5) = pOH pOH = 4.2.Read less