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Chem Catalyst

Chem Catalyst. Balance the following: Cu (s) + S (s)  Cu 2 S (s) Be (s) + O 2 (g)  BeO (s) K (s) + Cl 2 (g)  KCl (s) 2) What do these equations have in common?. Today’s Agenda:. Catalyst Notes: Types of Chemical Reactions Reaction analogies P. 339 #24.

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Chem Catalyst

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  1. Chem Catalyst • Balance the following: Cu(s) + S(s) Cu2S(s) Be(s)+ O2(g) BeO(s) K(s) + Cl2(g)  KCl(s) 2) What do these equations have in common?

  2. Today’s Agenda: • Catalyst • Notes: Types of Chemical Reactions • Reaction analogies • P. 339 #24

  3. Unit 5: Chemical Reactions BIG Questions • How does a chemical equation represent a chemical reaction? • Why do chemical reactions occur? • Why is balance essential when working with chemical reactions?

  4. Combination (Synthesis) • Two or more substances combine to form a single compound • A + B  AB • 2 Reactants, 1 Product • Ex: 2 Zn + O2  2 ZnO

  5. Decomposition Reaction • A single compound splits into two (or more) substances • XY  X + Y • 1 Reactant, 2 Products • Ex: 2HgO (s)  2Hg(l) + O2(g)

  6. Single-Replacement Reaction • An element replaces one of the ions in an ionic compound • A + BC  AC + B • 2 Reactants, 2 Products • Ex: Cu(s) + AgNO3(aq) Ag(s)+ CuNO3(aq)

  7. Double-Replacement Reaction • Ionic compounds exchange cations to form new ionic compounds • AB + XY  AY + XB • 2 Reactants, 2 Products • Ex: FeCl3 + 3 NaOH Fe(OH)3 + 3 NaCl

  8. Combustion • A hydrocarbon reacts with oxygen to form carbon dioxide and water • CxHyOz + O2 CO2 + H2O • 2 Reactants (hydrocarbon & O2), 2 Products (CO2, H2O) • Ex: C2H5O (l) + O2 (g) CO2 (g) + H2O (l)

  9. Examples: 2 C8H18(l) + 25 O2 (g) 16 CO2 (g) + 18 H2O (l) 2HgO(s) 2Hg(l)+ O2(g) CaI2 + Hg(NO3)2 HgI2+ Ca(NO3)2 2Mg + O2  2MgO Fe(s) + Pb(NO3)2(aq)Pb(s) + Fe(NO3)2(aq)

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