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Homework Help: Identification using dye

  1. May 4, 2015 #1
    1. The problem statement, all variables and given/known data
    For the identification of β-naphthol using dye test, it is necessary to use
    1. dichloromethane solution of β-naphthol
    2. acidic solution of β-naphthol.
    3. neutral solution of β-naphthol.
    4. alkaline solution of β-naphthol.
    2. Relevant equations

    3. The attempt at a solution
    There must be a reason which we can apply anywhere not for this question only.
    There is something to do with dye but dye is a colour or an Azo compound.
    How can we tell dye is basic or acidic?
    If we know that also then how to identify the given naphthol?
  2. jcsd
  3. May 9, 2015 #2
    Thanks for the post! This is an automated courtesy bump. Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
  4. May 9, 2015 #3
    Think about the mechanism for phenyl ring activation. How will a positively charged diazo compound react with a nucleophillic phenyl ring?
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