3.3.3.1 0.6 Outline the nucleophilic Practical activities: January 2011 Importance of organic chemistry: Nucleophilic substitution weeks substitution mechanisms of Preparation of Unit 2 Q8a and 8b Making medicines of halogenoalkanes with reactions. from OH–, CN– and NH3 June 2010 Explain why the Unit 2 Q2 bond enthalpy of hydrolysis of influences the rate of halogenobutanes. reaction. Students practice writing balanced equations and mechanism steps for different substitution reactions. 3.3.3.2 0.4 Explain the role of the Students practice writing balanced June 2013 Elimination. weeks reagent as both nucleophile equations and mechanism steps for Unit 2 Q5 and base. different elimination reactions. The concurrent January 2011 substitution and Outline the mechanisms of Students compare substitution and Unit 2 Q8 elimination reactions of these reactions elimination with different a halogenoalkane (eg halogenoalkanes. January 2010 with Unit 2 Q7 potassium hydroxide). June 2009 Unit 2 Q8 June 2002 Unit 3 Q6 3.3.3.3 0.4 Understand the role of Students write equations and January 2013 RSC resource on CFCs and ozone: depletion. ozone in the atmosphere. mechanisms for the formation of Unit 2 Q7 chlorine free-radicals and the Understand how chlorine destruction of ozone. June 2011 free-radicals can be formed Unit 2 Q7
3.3.3.1 Nucleophilic substitution of halogenoalkanes with OH–, CN– and NH3 0.6 weeks Outline the nucleophilic substitution mechanisms of reactions. Explain why the bond enthalpy influences the rate of reaction. Practical activities: Preparation of from of hydrolysis of halogenobutanes. Students practice writing balanced equations and mechanism steps for different substitution reactions. January 2011 Unit 2 Q8a and 8b June 2010 Unit 2 Q2 Importance of organic chemistry: Making medicines 3.3.3.2 Elimination. The concurrent substitution and elimination reactions of a halogenoalkane (eg with potassium hydroxide). 0.4 weeks Explain the role of the reagent as both nucleophile and base. Outline the mechanisms of these reactions Students practice writing balanced equations and mechanism steps for different elimination reactions. Students compare substitution and elimination with different halogenoalkanes. June 2013 Unit 2 Q5 January 2011 Unit 2 Q8 January 2010 Unit 2 Q7 June 2009 Unit 2 Q8 June 2002 Unit 3 Q6 3.3.3.3 depletion. 0.4 Understand the role of ozone in the atmosphere. Understand how chlorine free-radicals can be formed Students write equations and mechanisms for the formation of chlorine free-radicals and the destruction of ozone. January 2013 Unit 2 Q7 June 2011 Unit 2 Q7 RSC resource on CFCs and ozone:
AQA-7404-B-SOW.DOCX