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PowerPoint - Activity Series _amp; Double Displacement Reactions

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PowerPoint - Activity Series _amp; Double Displacement Reactions Powered By Docstoc
					The Activity Series
We have looked at several reactions:                K
    Fe + CuSO4  Cu + Fe2(SO4)3                     Na
                                                    Li
    Li + H2O  LiOH + H2           No, Ni is        Ca
                                 Yes, Li Na
The activity series ranks the relative is
                                   below            Mg
reactivity of metals.            above Zn           Al
It allows us to predict if certain chemicals will   Zn
undergo single displacement Yes, Al is
                                 reactions.         Fe
Metals near the top are most above Cu
                                 reactive and       Ni
will displace metals near the bottom.               Sn
                                                    Pb
Q: Which of these will react? Yes, Fe is            H
    Fe    + CuSO4  Cu + Fe2(SO4)3  above Cu        Cu
    Ni    + NaCl     NR (no reaction)              Hg
    Li    + ZnCO3  Zn + Li CO                      Ag
    Al    + CuCl2                 2   3
                        Cu + AlCl3                  Au
                                               K
H2 can be given off when a metal cold          Na
reacts with H2O or an acid.       H2O          Li
The reaction with H2O depends on               Ca
                                               Mg
metal reactivity & water temp. hot H2O         Al
Q: Will Mg react with H2O?                     Zn
                                       steam   Fe
A: No for cold, yes if it is hot/steam
Mg +       H2O            H2 + Mg(OH)2        Ni
                                        acid   Sn
Q: Zn + HCl  H2 + ZnCl2                       Pb
 Complete these reactions:                     H
 Al   +     H2O(steam)       H2 + Al(OH)3     Cu
 Cu   +     H2O       NR
 Ca   +     H2SO4 
                                               Hg
                          H2 + CaSO4
 Na   +     H2O                               Ag
                          H2 + NaOH
                                               Au
    Other Activity Series Information
• All metals have a specific place in the activity
  series. Only the most common metals are
  shown.
• The metals near the top of the activity series
  are more reactive because their valence
  electrons are more easily removed.
• On tests and exams the activity series may
  appear as K, Na, … Ag, Au; you must
  remember that K is reactive, Au is not.
• If the valence of a metal is not indicated, use
  its most common valence to determine the
  correct chemical formula.
                Oxides                      K
The formation                               Na
                     Oxides form via the    Li
and behavior of       addition of oxygen:   Ca
oxides can also         K + O2  K2O        Mg
be predicted via                            Al
the activity series. Oxides plus H2 (with   Zn
Complete these       heat) will change to   Fe
                       metal and H2O:       Ni
reactions:                                  Sn
                             heat
 Ca + O2  CaO NiO + H2  Ni + H2O          Pb
                                            H
Au + O2  NR       Oxides decompose         Cu
          heat
                       with heat:           Hg
Fe2O3+ H2              heat               Ag
        Fe + H2O HgO  Hg + O2             Au
         Sample Problem 8-6
• Use the activity series on page 266 (Table
  8-3)
• Zn(s) + H2O(l) 
  Zn(s) + H2O(l)  NR
• Sn(s) + O2(g) 
  Sn(s) + O2(g)  SnO
  – Balance!
• Cd(s) + Pb(NO3)2 
  Cd(s) + Pb(NO3)2  Cd(NO3)2 + Pb(s)
• Cu(s) + HCl(aq) 
  Cu(s) + HCl(aq)  NR

				
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