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Why is this a single replacement reaction

  1. Dec 2, 2012 #1
    the equation from my textbook: 2k+2H2O yields 2KOH+H2 why? I thought that such reactions are when one element swaps with another but in this case, there is an extra H2
  2. jcsd
  3. Dec 3, 2012 #2


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    Gold Member

  4. Dec 3, 2012 #3


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    Staff: Mentor

    Look at water molecule - what is swapped with what?
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