@来山多花 省级精品课程申报 答：D 15.HAc在下列哪一种溶液中解离度最大 A.0.1 mol-LNaCI B.0.1 mol-LHCI C.0.1 mol-LNaAc D.纯水 E.0.1 mol-LH2SO 答：A 16.Tt's known that the pK.of HA is 4.20,calculate the [H3O"],pH and [A']of the following solutions: (1)a solution consisted of 0.10 mol-L of HA and 0.20 mol-L of NaA; (2)a solution consisted of 0.10 mol-L of HA and 0.20 mol-L of HCL 0 HA+H20—HO+A 0.10-H00.1moL [H50*]0.20+H07≈0.2moL [HO][A]/[HA]= K=10420=6.31×105 [H0*]=KHA/[A7=(6.31×105×0.10/0.20)molL =3.15x105moL1 pH-4.50A7=0.20 (2) HA H2O HO'+A 0.10-H070.1moL1 H07+0.200.20moL1H07 :[Hr][A]/[HA]=K IA7=KHA/H07=(6.31×105×0.1/0.20moL1 =3.15x105m0lL1 [HsO]=0.20mol-L1 pH=0.70 17.100 mL of 0.010 mol-LNazSO solution was mixed with 100 mL of 0.20 moLKNOs solution,calculate the ionie strength of the mixed solution. 解： 6