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Types of Chemical Reactions
 

Types of Chemical Reactions

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    Types of Chemical Reactions Types of Chemical Reactions Presentation Transcript

    • Product or Reactant? • H2SO4 + BaCl2 1. BaCl2 Reactant Product 2. HCl 3. BaSO4 4. H2SO4 Product Reactant 2HCl + BaSO4
    • Review Chemical Reactions Law of Conservation of Matter
    • 1. Synthesis Reactions Combining of several simple substances to form a more complicated substance
    • Synthesis Reactions A + B  AB A = element B = element AB = compound
    • Synthesis Reactions 2Mg + O  2MgO 2 Magnesium (A) + Oxygen (B) Magnesium oxide (AB)
    • 2. Decomposition Reactions The break down of a compound into simpler substances AB  A + B Opposite of synthesis
    • Decomposition Reactions 2H O  2 2H2 + O2 Done by electrolysis
    • 3. Single Replacement A free element takes the place of, or replaces, another element Takes place between an element and a compound
    • Single Replacement A + BC  AC + B A – free element BC - compound AC – new compound B - new free element
    • Single Replacement Zn + 2HCl  ZnCl2 + H2 Hydrogen is set free
    • 4. Double Replacement  Two elements in two different compounds switch places with each other  Takes place between two compounds  Two new compounds form
    • Double Replacement AB + CD  AD + CB AB – compound 1 CD – compound 2 AD – new compound 1 CB – new compound 2
    • Double Replacement  Na(OH) + HCl  NaCl + H(OH)  (OH) and Cl change places  2 new compounds form  NaCl and H O 2
    • These reactions can be… ExothermicHeat is given off It feels hot!
    • These reactions can be… EndothermicHeat is absorbed It feels cold!