chem1000_topics07_fall2011

chem1000_topics07_fall2011 - CHEMISTRY1000...

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CHEMISTRY 1000 Topics of Interest #7: Sodium Acetate: Hot Stuff!
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Sodium  acetate  is  an  ionic  compound.    The  main  difference  between it and the ionic compounds we’ve seen so far in class is  that the anion isn’t monoatomic; it’s polyatomic: Like  the  other  ionic  compounds  we’ve  seen  in  class,  sodium  acetate forms a lattice.  An aqueous solution of sodium acetate will  form a lattice incorporating three water molecules per formula unit  of  sodium  acetate.    This  gives  an  overall  formula  of  Na(CH 3 CO 2 ) 3H 2 O,  called  sodium  acetate  trihydrate.    So,  if  a  solution  was  prepared  from  a  1  :  3  mixture  of  sodium  acetate  :  water, the whole solution would freeze as a single lattice (looking  more like ice than like a precipitate). Sodium Acetate Heat Pads
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chem1000_topics07_fall2011 - CHEMISTRY1000...

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