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Double Salts and Coordination Compounds

  1. Jun 19, 2011 #1
    This is an excerpt from the book I'm referring:
    "...when solutions containing two or more salts in stoichiometric (simple molecular) proportions are allowed to evaporate, crystals of new compounds separate out. These compounds are of two types : (1) Double Salts and (2) Coordination compounds."

    Q1. As per the above definition, should the solutions contain "salts only"??? Because when we mix NiCl2 soln. and NH3, we get a coordination compound. Here aq. NH3 is not a "salt" by definition......

    Q2. Are the constituent particles in the crystals of double salts its constituent salt molecules??? If so, what type of interactions hold them together in the lattice??? Re these interactions physical or chemical???

    Q3. For a coordination complex to be formed, free NH3 molecules must be present. Are they formed due to the eqm. NH3 + H2O -> NH4+ + OH-
  2. jcsd
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