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net ionic equation doesn't make sense

Discussion in 'DAT Discussions' started by Vsno123, Aug 6, 2011.

  1. Vsno123

    Joined:
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    Here's a question from Achiever test 1:

    What is the net ionic equation for the reaction between FeS and HCl?

    I thought I knew how to do net ionic equations until I ran into this question. I already have the solubility rules memorized which is why I don't get why FeS would dissociate in the first place since it is insoluble.

    The answer given is:
    FeS(s) + 2H+ (aq) --> H2S(g) + Fe2+ (aq)
     
  2. newbie1990

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    hmmm... i think it's because FeS is soluble in acid... i'm not sure how we're supposed to know this. hopefully since it's from an achiever test, it means it's one of those hard/random gen chem questions?
     
  3. FrostyFlakes

    5+ Year Member

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    FeS(s) + 2HCl(aq) --> FeCl2(aq) + H2S(g) Equation

    FeS(S) + (2H+) + (2Cl-) --> (Fe2+) + (2Cl-) + H2S(g) Ionic Equation

    FeS(s) + 2H+(aq) --> Fe2+(aq) + H2S(g) Net ionic equation
     

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