无机与分析化学试卷无机及分析化学期中自测卷2

华南农业大学无机及分析化学期中自测卷 2(258)1.2.3.Ag2O(s)96kJ.mol 1rHm(298K)-30 kJ.mol 1 Sm(298K) 122J.mol 1.K 1fGm 298KAAB96kJ.mol 1C66.36kJ.mol 1DH 0,298KS0,S0CH 0,S0DH 0rGm(298)11.6kJ.mol 1ACBD298K4.5.6.ACQ0W0U0HH00BDQ0W0U0HQQWUQWQWUQWH0ACCO2(g)C(s)O2(g)B2SO3(g) 2SO2(g) O2(g)2NH3(g) 3H2(g) N2(g)DCaSO42H2O(s) CaSO4(s) 2H2O(1)11.6kJmol 1rG mACBD7.8.ABCDA K= KB K=-KC K. K=1DK+ K=19.QKA Q KB Q KD Q= K10.11.12.13.ABCD0.1110mLB2030mLC3050mLD50ml1 14.15.0.1molL-1HClBK2Cr2O7H2C2O42H2ONaOHDNa2CO3161718pH2.0pH11.0pHAAA1.35Na2SB3.35C2.356.50c(Na+)=c(S2-)Bc(Na+):c(S2-)=2:1NaAcCc(Na+):c(S2-)2:1HAcc(H+) c(OH-)pH=3.0Bc(H+) c(Ac-)CDc(OH-)c(HAc)Dc(HAc)c(Ac-)19ACHCOOH-HCOONapKa=3.75BHAc-NaAcpKa =4.75NH4Cl-NH3 pKa=14-4.75H3PO4-NaH2PO4( pK =2.12)a 12021pHAABBCDNa2CO30.100 molL-1HCl()CD9.410.622NaOHHF(p Ka3.18)5.27.0D2324Na2CO3HClONa3PO4NaAcC6 H5 ONaC6H5COOHC6H5OH250.100 molL-1NaOHp KaHAcCpKa4.75pH7.75 9.70HB2.75pHAA8.7510.70B6.759.706.7510.70D5.759.7026p K(HIn)5.06.0pH4.05.0B5.0C4.06.0D5.07.027.HB0.10 molL-1 pH =3.000.10 molL-1NaBpHA11.00B9.00C8.50D9.5028.NaOHNaOH10ApHBpH2 CpHpHDpHpH29.NaOH()ABCDH2SK=1.310-7 K=7.110-15a1a2H2C2O4HCl+K=5.910-2 K=6.410-5a1a2Ka=1.410-3H3PO4K=7.610-3K=6.310-8K=4.410-13a1a2a31221.pHKw2H3PO4KKKKb ( PO43-)=a1a2a334_pH5_pH67.0.1 molL-1NaOH0.1 molL-1H2A Ka10=1.0 10-2 Ka20=1.0 10-7pH8.A0.1 molL-1NaOH0.1 molL-1NaOH0.1 molL-1NaOH1.0 molL-1NaOHHClBCDHAcHCOOHHCl9.H2SKa 1Ka 20.1 molL-1H2Sc(S2-)=pHc(S2-)(20)1.2.48C+CO2-393.5g=2COgf