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Homework Help: Describe chemical compounds as CHARGED, POLAR or NONPOLAR

  1. Dec 15, 2011 #1
    Ok, I thought the only two options in existence were Polar and Non-polar... and I'm being asked which ones are CHARGED? What does this mean?

    Example: NH4+ (ammonium), NO3- (nitrate), N2, O2, H2O

  2. jcsd
  3. Dec 15, 2011 #2
    ... or maybe they mean if the molecule is polar or non-polar and to say if it has a charge (ionized)?
  4. Dec 17, 2011 #3
    That is what they mean...

    All molecules are intrinsically polar or non-polar,

    Now certain ionic compounds (which are EXTREMELY polar hence given the name ionic btw) can become charged as well, think about how they behave in the presence of a polar medium

    The best example is as follows:

    Mixing salt (NaCl) with water (H20) what happens?

    Which is Polar/Nonpolar? Which is Ionic also? What happens then if they are mixed... Suppose that you were mixing just water inside a (high temperature) liquid salt medium... How would it behave

    Realize that Ionic means that you are mixing metals and non-metals together. (To understand why imagine what happens if you mix a halogen with an alkali metal)

    If you answer those questions above, it will make a lot of sense what the answer to this test is.
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