2 Poor thermal stability ammonium salts of non-oxidizing volatile acids NH,CIa→NH,(g)+HClg (NH)2 CO3-A >2NH3 (g)+CO2(g)+H2O(g) NH,HCO3->NH;(g)+CO2(g)+H2O(g) ammonium salts of non-oxidizing and non- volatile acids NH4)3PO4△→3NH3(g+H3PO4 (NH)2SO->NH;(g)+NHHSO
ammonium salts of non-oxidizing volatile acids N H HCO N H (g) C O (g) H O(g) (NH ) C O 2N H (g) C O (g) H O(g) N H C l N H (g) HCl(g) 4 3 3 2 2 4 2 3 3 2 2 4 3 ⎯→ + + ⎯→ + + ⎯→ + ammonium salts of non-oxidizing and nonvolatile acids 4 2 4 3 4 4 4 3 4 3 3 4 (NH ) SO NH (g) NH HSO (NH ) PO 3NH (g) H PO ⎯→ + ⎯→ + ② Poor thermal stability
ammonium salts of oxidizing acids NH4NO2A→N2(g+2H,O NH4)2Cr20,4→N2(g+Cr03(S)+4H20 5NH,N0,4N,+2HN0,+9:O NH4NO3A→N20+2H,O D
ammonium salts of oxidizing acids N H N O N O 2H O 5NH N O 4N 2HNO 9H O (NH ) Cr O N (g) Cr O (s) 4H O N H N O N (g) 2H O 4 3 2 2 2 3 2 240 C 4 3 4 2 2 7 2 2 3 2 4 2 2 2 ⎯→ + ⎯⎯⎯→ + + ⎯→ + + ⎯→ + 催化剂
2.Oxygen compounds of nitrogen Nitrogen oxide (NO)Colorless gas (1o)2(2c)2(3o)2(4o)2(5o)2(1π)4(2π)'：paramagnetic Chemical properties: 2N0+02-→2N02 2NO+C12→2NOC1(氯化亚硝酰) 3Fe2++NO;+4H*->3Fe++NO+H,O N2+O2→NO2 Fe(H2O)]2*+NO->[Fe(NO)(H2O)s]2++H2O brown Preparation: 4NH,(g+502(g 80cc→4NO(g)+6H20 铂丝网 3Cu+8HNO3(稀)→3CuNO3)2+2N0+4H2O
2. Oxygen compounds of nitrogen 3Cu + 8HNO3 (稀) → 3Cu(NO3 ) 2 + 2NO+ 4H2 O [ Fe(H O ) ] N O [Fe(NO)(H O ) ] H O 3Fe N O 4H 3Fe N O H O 2NO C l 2NOCl( ) 2NO O 2NO 2 2 2 5 2 2 6 2 - 3 3 2 2 2 2 + → + + + → + + + → + → + + + + + 氯化亚硝酰 4NH (g) 5O (g) 4NO(g) 6H2 O 800 C 3 + 2 ⎯⎯⎯→ + 铂丝网 • Nitrogen oxide (NO) Preparation： Chemical properties： Colorless gas brown (1) 2 (2) 2 (3) 2 (4) 2 (5) 2 (1) 4 (2) 1 : paramagnetic N2 + O2 → NO2
Nitrogen dioxide (NO2) molecular structure: N:2s22p3; sp2 hybridization (a)3个p轨道 Properties: ① toxic,brown gas ② 2NO,(红棕色) 140°C N2O(无色)△Ho<0 ③ 3NO2+H2O→2HNO3+NO ④ react with bases 2NO,+2NaOH->NaNO,NaNO2 +H2O
• Nitrogen dioxide (NO2 ) N: 2s22p3 ; sp 2 hybridization ① toxic, brown gas ③ 3NO2 + H2 O → 2HNO3 + NO ④ react with bases 2NO2 + 2NaOH → NaNO3 + NaNO2 + H2 O molecular structure： Properties： ② （无色）Hm 2NO（红棕色） 2 N2O4 <0 冷却 140 C 3 Π 3 Π
3.Nitrogen oxyacids and related salts Nitrous acid (HNO2) Molecular structure: N:sp2 hybridization: H 元 102 ①① 110 0:2s22p4 Preparation: NaNO2+H2SO4冷→NaHSO.4+HNO, NO+NO2+H,O冷冻→2HNO2 heat
3. Nitrogen oxyacids and related salts N：sp2 hybridization： 2 2 2 2 2 4 4 2 NO NO H O 2HNO NaNO H SO NaHSO HNO + + ⎯ ⎯→ + ⎯⎯→ + 冷冻 冷 π • Nitrous acid (HNO2 ) Preparation： Molecular structure： H O N O 102 。 110 。 heat O: 2s22p4