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Types of chemical reactions

Explore the different types of chemical reactions including precipitation, oxidation-reduction, acid-base, synthesis, combustion, and decomposition. Learn their definitions, examples, and characteristics.

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Types of chemical reactions

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  1. Types of chemical reactions Precipitation Reaction Oxidation - reduction Acid-Base * * *

  2. Review: Precipitation reactions In a double displacement (precipitation) reaction, the positive ion of one compound replaces the positive ion of another compound to produce two new compounds. AB + CD  CB + AD Which of the following reactions are double displacement reactions? 2NaCl  2Na + Cl2 NaOH + HCl  H2O + NaCl 2Na + 2HCl  H2 + 2NaCl KOH + HNO3  H2O + KNO3 Ca + S  CaS Acid-base reactions are just double displacement reactions that form water!

  3. Another way to think about oxidation-reduction reactions Single Replacement Ex. Pringle can demo – making H2 gas A + BC  B + AC

  4. Will a single replacement reaction always occur? Activity series for metals Activity series for halogens Decreasing Activity

  5. Review: Single-replacement reactions In a single replacement reaction, a free element becomes an ion and an ion becomes a free element. AB + C  CB + A Which of the following reactions are single replacement reactions? 2NaCl  2Na + Cl2 NaOH + HCl  H2O + NaCl K + AgCl  Ag + KCl 2Na + 2HCl  H2 + 2NaCl Ca + S  CaS

  6. Other types of oxidation-reduction reactions Combustion Reaction Ex. Burning parafin (candle lab) C,H compound + O2 CO2 + H2O

  7. Other types of oxidation-reduction reactions Synthesis Reaction Ex. Pringle can demo – burning H2 gas element A + element B  compound

  8. Other types of oxidation-reduction reactions Decomposition Reaction Ex. Splitting water into H2 and O2 compound  element A + element B

  9. Review: Synthesis reactions • In a synthesis reaction, two substances combine to form a single, more complex substance. • A + B  AB • Which of the following reactions are synthesis reactions? • NaCl Na + Cl2 • Na + HCl  H2 + NaCl • 2H2 + O2  2H2O • NaOH + HCl  H2O + NaCl • K + Cl2  KCl

  10. Review: Decomposition reactions • In a decomposition reaction, a single substance is broken down into two or more simpler substances. • AB  A + B • Which of the following reactions are decomposition reactions? • 2NaCl  2Na + Cl2 • 2Na + Cl2 2NaCl • 2H2O  2H2 + O2 • NaOH + HCl  H2O + NaCl • K + Cl2  KCl

  11. Types of chemical reactions Precipitation Reaction Oxidation - reduction Acid-Base * * * Synthesis Combustion Decomposition * * *

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