基础化学实验(一)习题及答案十

(220)()1.,A.B.C.D.()2ABCD()3pHpHApHBpHCpHDpH()4ABCD()5.Fe2+A.NH4NCSB.K3[Fe(CN)6]C.K4[Fe(CN)6]D.H2S()6.pHA.4B.4.2C.4.27D.4.275()7.A.B.C.D.()8.PbSO4APb(NO3)2;BNa2SO4;CHCl;DNH4Ac()9.A12(SO4)3Na2SAA12S3Na2SO4BA1O2-S2-CA1(OH)3H2SDA12S3SNaHSO4()10.Cr(VI)A.Cr3+;B.CrO42-;C.CrO3;D.Cr2O72-(200.5)1.2.3.pH,.4._________________________5.6.g7.289.________________________________10.MnO2Fe(OH)3(4)(10)101.Mn2+MnO4-Mn2+3362.A1H2ONH4C1Na2CO3442()6281NaCl42BaCl2Na2CO3CO32-43BaCl2Na2CO3BaSO4Na2CO3BaSO4BaCO3KSPBaSO4=1.1×10-10KSPBaCO3=5.1×10-984.??45SO42-Ca2+Mg2+Ba2+CO32-()“”46BaCl2Na2CO34()CO2141CO262CO28(220)1A2C3C4D5B6C7B8D9C10D(200.5)1.1.84g/ml,18.0mol•l-1,98%1.19g/ml,12.0mol•l-1,37%1.40g/ml,15.1mol•l-1,68%2.3.()()4.5.6.0.0001g7.8.(NO2)9.K2Cr2O710.Na2S2O3Na2S2O3(10)1.(6)1CuCl2(3)2PHKClNa2SO4BaCl2Na2SO4KCl(3)3PHNa2CO3HClNa2CO3PHNH4NO3()NH4NO3(4)101.Mn2+MnO4-Mn2+3362MnO4-+3Mn2++2H2O=5MnO2↓+4H+MnO2+4HCl()=MnCl2+Cl2+2H2O2MnO2+2H2SO4()=2MnSO4+O2+2H2O2.A1H2ONH4C1Na2CO34Al2O3A1H2ONH4C1Na2CO3A1H2NH4C1+H2O=NH3H2O+HCl2A1+6HCl=2A1Cl3+3H2Na2CO3+H2O=NaHCO3+NaOH2A1+2NaOH+2H2O=2NaA1O2+3H242()6281NaCl4SO42-Ca2+Mg2+2BaCl2Na2CO3CO32-4BaCl2SO42-Na2CO3Ca2+Mg2+Ba2+CO32-HClCO2Na2+Cl-NaCl3BaCl2Na2CO3BaSO4Na2CO3BaSO4BaCO3KSPBaSO4=1.1×10-10KSPBaCO3=5.1×10-98BaCl2SO42-Ba2+Na2CO3Na2CO3Ca2+Mg2+BaCl2SO42-Ba2+BaSO4Na2CO3Na2CO3BaSO4BaCO3BaSO4+Na2CO3=BaCO3↓+Na2SO4Na2CO3KSPBaCO3≈50KSPBaSO4,[CO32-]50[SO42-],BaS04BaC03.4.??4NaCl[Ba2+][SO42-]=KSPBa2+5SO42-Ca2+Mg2+Ba2+CO32-()“”4KClNaClK+6BaCl2Na2CO34()CO2141CO26CO22CO28CaSO4HClCO2.CaCl2.,,