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Homework Help: Left, Right or Double headed arrow?

  1. Feb 28, 2009 #1
    1. The problem statement, all variables and given/known data

    How do you know when to use Left, Right or Double headed arrows for Acid-Base equilibrium?

    2. Relevant equations

    How can you determine from a reaction if it "goes to completion" (right) or doesn't react at all (left) or is at equilibrium just by looking at it?

    3. The attempt at a solution

    This is just a general question. =)

    -Megan Rose
  2. jcsd
  3. Feb 28, 2009 #2


    User Avatar

    Staff: Mentor

    You have to know which acids and bases are strong and which are weak. Most reactions involving strong acids/bases go to completion so you can use one headed arrows pointing in teh direction where water is one of the products.


    1. to some extent you can always use double headed arrow, as almost every possible reaction goes in both directions.

    2. there will be always a grey area where every second chemist will have a different opinin on th earrow type that shoukd be used.

    Bottom line is: don't put too much attention to the arrow shape :wink:
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