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Reaction Types

Reaction Types. Chapter 6.2. . C. C. C. C. C. C. C. C. C. C. C. C. C. C. C. C. +. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. O. Synthesis reactions combine substances. Example C + O 2  CO 2.

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Reaction Types

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  1. Reaction Types Chapter 6.2

  2. C C C C C C C C C C C C C C C C + O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O O Synthesis reactions combine substances Example C + O2  CO2 General: A + B  AB

  3. Synthesis Example: NaCl  Na + Cl General: A + B  AB

  4. Hg Hg Hg Hg  + O O O O Decomposition reactions break substances apart Example 2HgO  2 Hg + O2 General: AB  A + B

  5. Decomposition Examples • Digestion (breaking down food molecules into simpler substances) • Electrolysis of water • Electrolysis—the process by which an electric current is used to produce a chemical reaction • 2H20 (with electricity)  2H2 + O2

  6. Electrolysis of Water

  7. + +  Cl Cl Cl Cl Zn Zn Cu Cu In single displacement reactions, elements trade place! Example: CuCl2 + Zn  ZnCl2 + Cu General: AX + B  BX + A

  8. Ca Ca  + + Mg Mg S S O O In double displacement reactions, ions are exchanged between compounds Example: MgO + CaS  MgS + CaO General: AX + BY  AY + BX

  9. Combustion is a reaction involving oxygen, where heat is released Example: 2CH4 + 4O2 CO2 + 4H2O

  10. Combustion products depend on the amount of oxygen present • If not enough oxygen is present, a combustion reaction may produce the toxic carbon monoxide as a product • Example: 2CH4 + 3O2 CO + 4H2O

  11. Your favorite! • It’s good to hear it again though…

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