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When preparing the molecule luminol why do you need to heat the mixture of hydrazine and...

When preparing the molecule luminol why do you need to heat the mixture of hydrazine and 3-nitrophthalic acid? Write the equation.

These are the procedures for the lab:

Method

Part 1 in hood

  1. Weigh 0.15g 3-nitrophthalic acid and place in -0.2 mL 10% hydrazine
  1. Insert Al block
  1. Gently heat to dissolve- hot plate @ 125 C
  1. Add 10 drops ethylene glycol
  1. Add boiling stone
  1. Turn hotplate to 450 C- heat to 210-220 C for 3 min and use temperature probe
  1. Cool to <100 C
  1. Add 2.0 mL hot water
  1. Collect by vacuum filtration

Part 2- At bench

  1. Crude product to 13 x 100 test tube
  1. Add 0.65 mL 10% NaOH
  1. Dissolve crude product
  1. Add 0.40 g Sodium hydrosulfite
  1. Wash solid down walls with minimal H2O
  1. Clamp test tube
  1. Heat to boil

-hot plate to 200 C

-boil for 5 minute
  1. Add 0.26 mL Glacial Acetictcal
  1. Cool
  1. Collect by vacuum filtration

Part 3

Beaker #1

  1. Place filter paper+luminol in beaker
  1. Add 0 mL 10% Na OH
  1. Add 10.0 mL DI H20
  1. Then add additional 18 mL DI H2O

Beaker #2

  1. 2.0 mL 3% potassium ferricyanide
  1. Add 0 mL 3% H2O2
  1. Add 15.0 mL DI H2O
  1. Bring 2 beakers to weigh room, professor will mix
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