茂名市2019年中考化学试题及答案

12019161008023.H-1O-16F-19Na-23Mg-24P-31S-32142281ABCD2A.BCD3A2HB3NC+2MgD22NaO4pH7ABCD56ABCD77Ax42BC34D78.96g8ABCD9A[CO(NH2)2]BCD1010ABH2O2C2H2O=2H2+O2Da11AMnO2KClBNaClNa2CO3CCO2CODCCuO123ABCD13ABCNaOHNaOHDCuOH214ABCD520153151_____________2____________3_________1641641__________2_______3___________________ABC17517130280318411H21H31H1H2H3H1H2H3H1811H2H3H222H2O22HO32H2O518-232H2O1941192O221520720ABCDEFGHOSClKBa1AE2DG3A~GABCD218ZnFeCuZnO21Zn(OH)212Zn3pHNaOH64Zn(OH)22232212221a2A3H2O24FO2Fbc5ECDCH42311CO21CO2CaCO3Ca(HCO3)22AgClCO2HClCO2CO21723CO2HClCO2NaHCO3CO221424424Na2PO3F1441F2Na2PO3F3Na2PO3Fg25.10Mg(OH)2MgSO4H2SO44100g4%NaOHNaOH/g10.020.030.040.0Mg(OH)2/g0.2320.5220.5800.580182100gMgSO43254%NaOH0~30.0gMg(OH)29142281.B2.A3.B4.C5.C6.D7.C8.D9,C10,A11,D12,D13.A14.B52015123B16.1CaO23B17.1260%318.12332222H+O2HO19.12343Fe+2OFeO;221520.2SOBaO2424KSO+BaCl=2KCl+BaSO24422BaOH+HSO=BaSO+2HO21.Cu44Zn+CuSO=ZnSO+Cu2ZnOHNaOH22ZnOHZnO+HO1022.A2MnO22222HO2HO+OcB23..32222HCl+CaCO=CaCl+HO+CO2MgCl23NaCO3AgNO33AgNO+HCl=AgCl+HNO21424.12232432.125.12100g4MgSOx.4242MgSO+2NaOH=MgOH+NaSO12058x0.58g120580.58gxx=1.2g:100g4MgSO1.2g11