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1151 elementary substance elementary substance elementary

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					                                                           11.5 copper and silver




                        11.5                                                    11.5.1 elementary substance
                 COPPER AND SILVER
                 COPPER AND SILVER
                                                                                11.5.2 some important compounds




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11.5.1 elementary substance                                11.5.1 elementary substance

  1.physical properties of copper and silver:
  1.physical                          silver:                            4Ag + 2H2S + O2 → 2Ag2S(黑) + 2H2O
   ①melting point , boiling point
   ②electrical conductivity ,                                [Cu(NH3) 4] 2+
                                                                              4Cu + O2 + 2H2O + 8NH3
                                                      铜锈                                →4[Cu(NH3)2]+ (无色) + OH -
      thermal conductivity
       Ag > Cu > Au;                                                                                    O2
   ③ductibility                                                                                      [Cu(NH3)4]2+(蓝色)
  2.chemcal property:
  2.chemcal property:
 2Cu + O2 + H2O + CO2 →
                   Cu2(OH)2CO3(绿)

                        休息                                                                  休息          目录
                              3                                                                  4




11.5.2 some important compounds                            11.5.2 some important compounds

  1.Properties of main compounds:               Cu(OH)2             4CuO ∆            2Cu2O+ O2
  (1) solubility:
      solubility:                                                                 ℃
                                                                                440
                                                                    2AgNO3 → 2Ag + 2NO2 + O2
  MO与MOH :
         MOH:
    Cu(OH)2两性偏碱性:
     Cu(OH)2 + 2OH - →                                       (3) light sensitivity:
                                                                       sensitivity:
                          [Cu(OH)4]2-(亮蓝色)                         许多Ag(Ⅰ)化合物对光敏感:
  salt:
  salt:                                                                                hυ
  CuCl > CuBr > CuI > CuSCN > CuCN > Cu2S                                       AgX → Ag + 1/2X2
  AgCl > AgBr > AgI                                          (4)complex:                       CuCl↓(白色)
  (2) thermal stability:
               stability:                                    ①Cu(I):
                                                                Cu(I)                   H 2O
                                                                                     ∆
          Cu2O > CuO.
                   CuO.                                         Cu + Cu2+ + 4HCl(浓) →2[CuCl2]-(泥黄色)
                                                                                               泥黄色
                        休息                                                                  休息
                              5                                                                  6




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11.5.2 some important compounds                              11.5.2 some important compounds


 ②Cu(II):
  Cu(II)                                                      ③Ag+:
                                                              2Ag+ + 2NH3 + H2O→Ag2O↓ + 2NH4+
 Cu2+ + 4Cl-(浓) → [CuCl4]2- (黄色)                              Ag2O + 4NH3 + H2O → 2[Ag(NH3)2]+ + 2OH -
                  H 2O
                         [Cu(H2O)6]2+(蓝色)                     silver mirror reaction (银镜反应):

                                                              2[Ag(NH3)2]+ + HCHO + 3OH- →
                                                     6
                                                                                HCOO- + 2Ag↓+ 4NH3 + 2H2O

                                                        2+
                                            [Cu(H2O) 6]
                      休息       10                                                8 休息
                           7                                                            8




11.5.2 some important compounds

  (5)其它较典型的性质:
   ① 无水CuSO4 strong water absorption
      检验或除去有机液体中微量水.
     当有氧存在时,适当加热Cu2O能生成CuO;
  ②当有氧存在时                          CuO;
      除去氮气中的微量氧:
      2Cu2O(暗红色) + O2→4CuO(黑色)
            暗红色
   ③ Ag+ 与S2O32-反应较为典型.
                反应较为典型
     2Ag+ + S2O32- → Ag2S2O3↓
     Ag2S2O3 + H2O → Ag2S ↓+ H2SO4

                      休息
                           9




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Description: 1151 elementary substance elementary substance elementary