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Chemistry Unit 7 – The Mole

Chemistry Unit 7 – The Mole. Lesson 10 – Predicting Products Part II – Single Replacement Book Section: 11.2 Objective: SWBAT predict the products of single replacement reactions using the activity series. Agenda: HW Review, Lesson, HW. Oxidation and Reduction.

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Chemistry Unit 7 – The Mole

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  1. ChemistryUnit 7 – The Mole Lesson 10 – Predicting Products Part II – Single Replacement Book Section: 11.2 Objective: SWBAT predict the products of single replacement reactions using the activity series. Agenda: HW Review, Lesson, HW

  2. Oxidation and Reduction • Single replacement reactions are driven by oxidation and reduction. • Oxidation is the loss of electrons • Reduction is the gain of electrons

  3. Oxidation-Reduction • Example: • AgNO3 + Cu  Cu(NO3)2 + Ag • Silver on left: +1 Silver on right: 0 • Copper on left: 0 Copper on right: +2 • Silver is reduced from +1 to 0 • Copper is oxidized from 0 to +2 • Single replacement reactions are also known as redox reactions as a result.

  4. Predicting Single Replacement • So, this reaction happens: • AgNO3 + Cu  Cu(NO3)2 + Ag

  5. Predicting Single Replacement • So, this reaction happens: • AgNO3 + Cu  Cu(NO3)2 + Ag • What about the reverse reaction? • Cu(NO3)2 + Ag  AgNO3 + Cu

  6. Predicting Single Replacement • So, this reaction happens: • AgNO3 + Cu  Cu(NO3)2 + Ag • What about the reverse reaction? • Cu(NO3)2 + Ag  AgNO3 + Cu • Hopefully logic would tell you that the reverse reaction is not spontaneous. • We would have to force it to happen using electricity. • So, how do we know which redox reactions will happen and which ones won’t?

  7. Activity Series • This chart tells you how active a metal is, or how able it is to displace another metal in a single replacement reaction.

  8. Activity Series • Compare the two metals involved in the reaction. • The metal that is higher on the activity series is “more attractive.”

  9. Activity Series • Take our previous example: • AgNO3 + Cu  • Copper is higher than silver, so copper can displace silver. • AgNO3 + Cu  Cu(NO3)2 + Ag • Because copper is higher than silver, the reverse reaction will not occur.

  10. Practice • Zn + HCl 

  11. Practice • Zn + HCl  ZnCl2 + H2

  12. Practice • Au + HCl 

  13. Practice • Au + HCl  no reaction

  14. HW 7-9 Due Next Week • This Week: • Thursday: Dr. Strangelove or How I Learned to Stop Worrying and Love the Bomb • Friday: Dr. Strangelove or How I Learned to Stop Worrying and Love the Bomb • Chemical Reactions Half-Test – Friday, March 11th

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