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Zn(NO3)2 problem

  1. Mar 22, 2005 #1
    Zn(NO3)2 problem!!!

    Zn(NO3)2 will react with NaOH, precipitate will form, but continueing adding sodium hydroxide will dissolve Zn(OH)2.

    2NaOH + Zn(NO3)2 -> Zn(OH)2 + 2NaNO3

    Zn(OH)2 + 2NaOH -> Na2ZnO2 + 2H2O

    It happens similarly with Al(NO3)3 reacting with NaOH.

    3NaOH + Al(NO3)3 -> Al(OH)3 + 3NaNO3

    Al(OH)3 + NaOH -> NaAlO2 + 2H2O
     
  2. jcsd
  3. Mar 22, 2005 #2
    So what is the problem???

    The Bob (2004 ©)
     
  4. Mar 24, 2005 #3
    Post Trans. cations react extensively with OH- and ppts tend to dissolve as metal ions converts to a soluable hydroxo complex ion.
     
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