(1) [H+] = (Kac)^1/2=(1,8*10^-5 *0.1)^1/2=1.34*10^-3mol/LPH=2.87(2)[OH-] = (Kbc)^1/2POH = 1/2(PKw-PKa-lgc)=1/2(14-4.74+1.30)=5.28PH=14-5.28=8.72