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Instead of HCl why should I use H2SO4+NaCl?

  1. Apr 16, 2015 #1
    1. The problem statement, all variables and given/known data
    In my book there is a reaction given that is:
    MnO2+4HCl→MnCl2+Cl2+2H2O
    To prepare Cl2.
    And then it is given that in place of HCl, a mixture of H2SO4+NaCl is used.... but why?


    2. Relevant equations
    None

    3. The attempt at a solution
    NaCl+H2SO4→NaHSO4+HCl
    We here also get HCl. So why should we not use HCl directly? Why should be prefer the latter method?
     
  2. jcsd
  3. Apr 16, 2015 #2

    SteamKing

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    One reaction gives free chlorine gas and one doesn't. You select the reaction appropriate to the end products you wish to obtain.
     
  4. Apr 16, 2015 #3
    But both GIVE Cl2 as a product. It is just that the later one gives HCl which then reacts with MnO2. (Thats what I think. ) to give Cl2.
     
  5. Apr 16, 2015 #4

    SteamKing

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    That wasn't clear from the way the reaction equations were presented.
     
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