(1)第三周期VIA族 (2) (3)NH3和H2O都为极性分子,相似相溶;NH3分子和H2O分子间易形成氢键 (4)c(NH4+)﹥c(Cl-)﹥c(OH-)﹥c(H+) (5)CH3CH2OH-12e-+16OH-=2CO32-+11H2O (6)CH3CH2OH-12e-+ 3H2O =2CO2+12H+ (7)离子晶体;Na2S+2H2OS↓+2NaOH+H2↑ |
(1)N;C;H (2)强于;2HNO3+Na2CO3==CO2↑+H2O+2NaNO3 (3) (4)NH3+H2O+CO2==NH4HCO3 |
(1)硫化钠 (2)H3O+ (3)SO2或H2O2 (4)2H2SO4(浓)+CuCuSO4+SO2↑+2H2O (5)2Na2O2 + 2H2O = 4NaOH + O2↑ 或 3NO2 + H2O = 2HNO3 + NO |
(I)分子晶体; (2)O=C=O; Ca2+ (3)②④ (4)Si +2OH- + H2O==SiO32- +2H2↑ (5)0.25;2.8 |
(1)H;O;Mg;Cl (2)Mg(OH)2+2HClO4==Mg(ClO4)2+2H2O (3)有气泡、变红;Mg+2H2OMg(OH)2+H2↑ |
(1)S (2)共价键和离子键;离子晶体;电子式“略” (3)CO32-+H2OHCO3-+OH-或C2O42-+H2OHC2O42-+OH- (4)0.3 mol Na2O2,0.1 mol Na2CO3 |
(1)Be;H2S (2)Fe+SFeS;2Fe+3Cl22FeCl3(或H2S+Cl2==S↓+2HCl) (3)2 (4)Al3++3AlO2-+6H2O===4Al(OH)3 |
(1)H;C;S (2) (3)极性;非极性;sp |
(1)1s22s22p63s23p63d104s24p3;As (2);氧 (3)三角锥形 (4)As2O3+6Zn+6H2SO4==2AsH3↑+6ZnSO4+3H2O (5)稳定性:NH3> PH3> AsH3,因为键长越短,键能越大,化合物越稳定沸点:NH3> AsH3> PH3, NH3可以形成分子间氢键,沸点最高,AsH3相对分子质量比PH3大,分子间作用力大,因而AsH3的沸点比PH3高 |
(1) (2)S=C=S (3) 3NaN3 ==4N2 + Na3N ; |