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Reaction of Metal salt with Sulphuric acid

  1. Sep 29, 2015 #1

    Titan97

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    Its given in my book that Sulphuric acid displaces more volatile acid from Metal salts like NaCl.
    That is, NaCl + H2SO4→ HCl + Na2SO4
    What does valtility have to do with such reactions?
    Or Should I just accept it as a fact?
     
  2. jcsd
  3. Sep 29, 2015 #2

    Bystander

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    Label reactants and products with their states/phases at standard conditions.
     
  4. Sep 30, 2015 #3

    Titan97

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    NaCl is solid, Sulphuric acid is liquid?
     
  5. Sep 30, 2015 #4

    Bystander

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    And products?
     
  6. Sep 30, 2015 #5

    symbolipoint

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    NaCl is fairly soluble in water, and sulfuric acid is very soluble in water, and both are very much ionized when dissolved in water. You have a solution of ions. (I really should check on the solubility of sodium sulfate just to be more thorough and correct in my comment).
     
  7. Sep 30, 2015 #6

    Bystander

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    As written, reaction is not necessarily in aqueous solution.
    Edit: see Sharks and Little Fish, Wolfgang Ott, and/or Das Boot for the aqueous case (chlorine evolution).
     
  8. Sep 30, 2015 #7

    Titan97

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    Sulphuric acid is not volatile hence it does not come out with HCl gas. Other acids can be used as well. But nonvolatile acide like sulphuric acid is preferred to get pure HCI. Am I correct?
     
  9. Sep 30, 2015 #8

    Bystander

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    Yes. "Pure?" Depends.
     
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