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Chemical Reactions

Chemical Reactions. Text Reference: 8.2 (pg. 256 - 264). . C. C. +. O. O. O. O. Types: Synthesis. Example C + O 2. General: A + B  AB. . +. Na. Na. Cl. Cl. Types: Decomposition. Example: NaCl. General: AB  A + B. +. +. . Cl. Cl. Cl. Cl. Zn. Zn. Cu. Cu.

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Chemical Reactions

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  1. Chemical Reactions Text Reference: 8.2 (pg. 256 - 264)

  2. C C + O O O O Types: Synthesis Example C + O2 General: A + B  AB

  3. + Na Na Cl Cl Types: Decomposition Example: NaCl General: AB  A + B

  4. + +  Cl Cl Cl Cl Zn Zn Cu Cu Types: Single Replacement Example: Zn + CuCl2 General: AB + C  AC + B

  5. Ca Ca  + + Mg Mg S S O O Types: Double Replacement Example: MgO + CaS General: AB + CD  AD + CB

  6. Types: Combustion • CHO + O2 CO2 + H2O • CH4 + O2  CO2 + H2O • CH3OH + O2  CO2 + H2O • Reactants: always oxygen with another compound that contains hydrogen and carbon • Products: always CO2 + H2O

  7. The Activity Series Text Reference: 8.3 (pg. 265 - 267)

  8. We have looked at several reactions: Fe + CuSO4  Cu + Fe2(SO4)3 Li + H2O  LiOH + H2 • The activity series ranks the relative reactivity of metals. • It allows us to predict if certain chemicals will undergo single replacement reactions when mixed. • Metals near the top are most reactive and will replace metals near the bottom.

  9. No, Ni is below Na Yes, Li is above Zn Yes, Al is above Cu Yes, Fe is above Cu Cu + Fe2(SO4)3 Q: Which of these will react? Fe + CuSO4  Ni + NaCl  Li + ZnCO3  Al + CuCl2  NR (no reaction) Zn + Li2CO3 Cu + AlCl3

  10. cold H2O A: No for cold, yes if it is hot/steam Mg + H2O  hot H2O H2 + Mg(OH)2 The reaction with H2O depends on metal reactivity & water temp. Q: will Mg react with H2O? steam Q: Zn + HCl  H2 + ZnCl2 acid Complete these reactions: Al + H2O(steam)  Cu + H2O  Na + H2O  H2 + Al(OH)3 NR H2 + NaOH

  11. Other Activity Series Information • All metals will have a specific place in the activity series. For simplicity, only the most common metals are shown. • The metals near the top of the activity series are more reactive because their valence electrons are more easily removed.

  12. Mg + AgNO3  Ag+ Mg(NO3)2 Cu + AgNO3  Ag+ Cu(NO3)2 Zn + AgNO3  Ag+ Zn(NO3)2 AgNO3 Zn + CuCl2  Cu + ZnCl2 Mg + CuCl2  Cu + MgCl2 CuCl2 NR Mg+ Fe(NO3)3  Fe+ Mg(NO3)2 Zn+ Fe(NO3)3  Fe+ Zn(NO3)2 Fe(NO3)3 NR

  13. Homework • P. 264 #1-3 • P. 267 #1-3

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