60mL 0.5mol/L的氢氧化钠溶液中n(OH-) = 0.5*0.06 = 0.03mol40mL 0.4mol/L硫酸溶液中n(H+) = 0.4*0.04*2 = 0.032mol反应后溶液中n(H+) = 0.032-0.03 = 0.002mol溶液体积约为60+40=100ml=0.1L所以c(H+) = 0.002/0.1 =...