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    Hi, I would really appreciate some help here,

    White shiny solid
    Melting point = 560C
    Very insoluble in water
    Conducts elec. when molten (not when solid)

    What is it?

    Thanks.
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    Is it the actual compound you want or its bonding? It's pretty clear its ionic and it's very unusual that it doesn't dissolve in water so you could run a search on Google.
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    Dunno,
    Potassium iodate has the correct melting point and it's a white solid at room temperature...

    Although i'm not sure how common a melting point is between other white solids so it could be many other things...
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    (Original post by Internet)
    Hi, I would really appreciate some help here,

    White shiny solid
    Melting point = 560C
    Very insoluble in water
    Conducts elec. when molten (not when solid)

    What is it?

    Thanks.
    Let's apply a bit of logic..

    Yes, it's ionic

    All potassium, sodium and ammonium salts are soluble, therefore eliminated
    All nitrates and ethanoates are soluble therefore eliminated.

    It's white, so the majority of transition metal salts are eliminated..

    The low melting point suggest weak lattice enthalpy so it's unlikely to have ions with a high charge density (small 2+ or 3+ cations, 2- anions), although carbonates are usually low mp (if they don't decompose)

    now it's data search..
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    Magnesium Carbonate?
 
 
 
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