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IB Chemistry HL 3.4.10 Hl Leaving Group Effects Questions

Use real HL exam questions to compare halogenoalkane leaving groups, relate C–X bond strength and polarity to bond breaking, and predict rate changes under fixed conditions.

Syllabus
First assessment 2025
Course
Chemistry HL
Level
HL

Exam points

  • Compare C–X bond enthalpy, bond length or strength for different leaving groups and use the comparison to predict which substitution or hydrolysis reaction is faster under otherwise identical conditions.
  • Explain how C–X bond polarity changes down group 17 and link that polarity/electronegativity change to nucleophilic attack and the observed reaction-rate trend.

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Study 3.4.10 (HL)—Leaving group effects conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Chemistry HL 3.4.10 Hl Leaving Group Effects Questions question 1

[Maximum number: 1]

Organic compounds have many industrial applications.

1-Bromobutane reacts with aqueous sodium hydroxide, NaOH(aq), to form butan-1-ol.

Outline how the rate of reaction of 1-bromobutane with sodium hydroxide compares with the rate of reaction of 1-chlorobutane with sodium hydroxide under the same conditions.

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