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Volume needed to precipitate something

  1. Feb 8, 2005 #1
    what volume of 0.100 M lead nitrate is required to precipitate completely 25.0 mL of 0.0832 M nickel(II) sulfate?

    what are the steps to completing this problem? thanks
  2. jcsd
  3. Feb 8, 2005 #2
    Determine how many moles of SO4(-2) there are in the NiSO4 solution. Since Pb(+2) reacts with sulfate on a mole for mole basis, that's the number of moles of Pb(+2) you need. Then determine the volume of Pb(NO3)2 solution which contains that many moles. By the way, since PbSO4 is not COMPLETELY insoluble (nothing is), you'll never precipitate out every last sulfate ion.
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