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Acids and Bases Definition

  1. Jun 2, 2013 #1
    Lets say a certain chemical reacts with an acid. Does that make that chemical a base always and vice versa?

    Like in S + NaOH → Na2S + Na2S2O3, Sulfur reacting with a base would it make S an acid?

    Or do we call it a base or an acid, reacting with the opposite if it's producing water as a byproduct?
     
  2. jcsd
  3. Jun 3, 2013 #2

    Borek

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    Staff: Mentor

    What classifies as an acid-base reaction depends on the definition of acid and base (and there are many, three most often used are Arrhenius definition, Bronsted-Lowry def. and Lewis def.).

    Reaction you listed is too complex to be classified as a simple acid-base reaction, no matter which definition you use.
     
  4. Jun 3, 2013 #3
    So it is just a redox reaction, no acid base reaction? :)
     
  5. Jun 3, 2013 #4

    Borek

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    Staff: Mentor

    You can put it this way. It is hardly a single step reaction, so it is quite possible some of the stages qualify as acid-base reactions.
     
  6. Jun 4, 2013 #5
    But Sulfur is not an acid in this reaction, right?
     
  7. Jun 4, 2013 #6

    Borek

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    Staff: Mentor

    No, it is not.
     
  8. Jun 4, 2013 #7
    :smile: That's all I want to know. Thank you!
     
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