• In the basification step, you use concentrated NaOH solution to minimize the volume of the final solution. Recall that a dilute solution of HCl was used to extract the amine as its water-soluble salt (see the picture on the right side).
  
  
• Basification must be done carefully, portion by portion, with swirling each time because the acid-base neutralization reaction is exothermic.
  
  
• Check the pH of the solution to ensure that it is basic. (~pH 10)

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