PHS3CPH.PH1.PH2.PHNAOHHCL3.PH(PH=7.0),4.PHPHPHCALCALPH(PH=7.0)7.05.6.PHPHPHPH7.PHPH8.PHNAOHHCL9..PH1.2.(1)(2)KCl(3)(4)3.PH4.PH6.86PH5.6.PH6.8625ml20mlPH6.866.86(1)PH6.86(2)7.PH4.008.PH4.0025ml20mlPH4.00PH4.009.10.PHPH(1)40(2)11.4812.PH1.ph242.ph3.pH=6.86pHpH=4.00pH=9.184.5.PHPH6.PHPH7.PH8.3mol/L9.pH101210.pH=6.86pH=9.181530min11.3mol/L3mol/L20ml3mol/L12.4%HF35s0.1mol/L