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Metals, Characteristics - Coggle Diagram

- - - - CO2 is a greenhouse gas
  - - - exothermic
  - - - endothermic
  - - - exothermic
- - - - coating with oil or grease, covering with plastic
      - coating with a metal less reactive than Fe (Sn)
      - painting
    - - coating Fe with Zn
        
        the layer of Zn prevent
        the contact with O2 and H2O (barrier)
        
        if coating is damaged, sacrificial protection of Zn
        ( Zn is more reactive than Fe)
      - Oxide layer acts as a barrier to further corrosion
    - - attaching blocks of metal (more reactive than Fe (Zn, Mg, Al) to metal hulls or keels of boats
- - - - 2ZnS+3O2---->2ZnO+2SO2
        
        Reduction
        
        ZnO+CO---->Zn+CO2
        
        ZnO+C----->Zn+CO
      - Zinc product leaves the blast furnace as a vapor from the top
      - Electrolysis
        
        anode: 4OH- -------->2H2O+O2+4e-
        
        cathode: Zn2+ + 2e- ------>Zn
        
        Electrolyte
        
        ZnO + H2SO4--->ZnSO4 +H2O
      - characteristics of Zinc
        
        can prevent steel from rusting ------>sacrificial protection
  - - - electrodes: graphite
      - electrolyte: molten alumina (Al2O3) + Cryolite ( for decrease the m.p. of alumina
      - anode: Al2+ + 2e- ----->Al
      - 2O2- ----> O2 +4e-
        
        C+O2 ----->CO2 ( at high temperature, O2 eats away Carbon anode
      - characteristics of Al
        
        low density
        
        malleable and ductile
        
        good conductor of heat and electricity
        
        generally Non-toxic
  - - - impurity: carbon + sand
    - - C+O2---->CO2
      - S+O2----->SO2
      - 4P+5O2------>2P2O5
      - SiO2+P2O5----->slag
- - - - with 0.5% of Carbon
        
        Car bodies
        
        large structures
    - - with Nickel, Chromium
        
        cutlery
        
        reaction vessels in chemical plants
- - - - expect. Sodium(Na);Potassium(K)
    - - Expect. Na;K
    - - except Na,K