LSE 2

• What is the title of LSE 2?

  Azo dye test
• The azo dye test is a test used to determine whether an organic compound contains a _ group.

  primary aromatic amine
• What is used to prepare the beta naphthol solution?

  Sodium hydroxide
• What is used to make a nitrous acid?

  Sodium nitrite
• This can react with a primary aromatic amine to form a diazonium salt.

  nitrous acid
• The reaction of a nitrous acid and primary aromatic amine forms a

  diazonium salt
• The unknown compound contains a primary aromatic amine if there is a formation of _.

  red azo dye
• At the beginning of the experiment, what are the 2 compounds in the 2 separate test tubes?

  Beta-naphthol

  Unknown compound
• What is added to the beta-naphthol?

  NaOH (Sodium Hydroxide)
• The mixture of beta naphthol and sodium hydroxide is put in _ bath.

  ice
• What is added in the unknown compound?

  HCl (Hydrochloric acid)
• The mixture of the unknown compound and HCl is put in an _ bath.

  ice
• What is added to the test tube of the unknown compound and HCl?

  Sodium nitrite
• What is the mixture of unknown compound, HCl and sodium nitrite called?

  Diazonium chloride solution
• What is mixed to get an azo dye?

  Diazonium chloride solution

  Beta-naphthol solution