1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Formation of hydrates from ionic compounds

  1. Dec 22, 2013 #1

    Qube

    User Avatar
    Gold Member

    1. The problem statement, all variables and given/known data

    Not really much of a problem - just a general question and some speculation on its answer.

    Why do some ionic compounds such as aluminum fluoride form hydrates while other ionic compounds such as sodium fluoride don't form hydrates upon being dissolved in solution?

    2. Relevant equations

    Water is a polar molecule.
    Coulombic attraction. Attraction (q) is inversely proportional to the distance between the radii of the two charged particles.

    3. The attempt at a solution

    I'm guessing this is due to the fact that sodium is a much bigger molecule than aluminium and sodium has only a +1 charge while aluminium has a +3 charge. These two factors cause aluminum ions in solution to form aluminium hydrate (aluminium with 6 water molecules attached) while sodium doesn't do anything in solution; it stays as an ion.
     
  2. jcsd
  3. Jan 31, 2014 #2

    Borek

    User Avatar

    Staff: Mentor

    This is more about water creating complexes (being a ligand).
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted



Similar Discussions: Formation of hydrates from ionic compounds
  1. Ionic compound (Replies: 1)

Loading...