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Answers section


Related Topic: Organic Chemistry 1

Related Subtopic: Laboratory preparation of ethene



Questions 3.2.3

  1. Suggest a reason for using a sandbath in the process.
  2. How is violent bumping (shaking that might break the round bottom flask) prevented in this experiment?
  3. Explain the role of sodium hydroxide solution in this set-up. What property of sodium hydroxide solution makes it suitable for this role?



Answers to Questions 3.2.3


  1. Sand bath spreads (distributes) the heat uniformly to avoid overheatng of one part of glass, as this can cause breakage.
  2. Bumping is prevented by porcelain chips.
  3. Sodium hydroxide solution absorbs carbon (IV) oxide and sulphur (IV) oxide, which contaminate ethene (removing them from their mixture with ethene). Sodium hydroxide is a base; so it reacts with the acidic gases.