Chapter 7.2

Five Basic Types of Reactions Synthesis Decomposition _________ Replacement Combustion (very special reactions)

#1 Synthesis Reactions ______ or more reactants combine to make one product Chemical Examples! Cu + O 2  CuO H 2 + O 2  H 2 O G eneral:

#2 Decomposition Reactions  decompose --- “_________________”  one reactant breaks down into _____ or more simpler products.  Examples: NaCl  Na + Cl 2 CaCO 3  CaO + CO 2  General:

#3 Single Replacement  One free element ___________another element in a compound!  Analogy- “getting dumped”  Examples: Na + KCl  K + NaCl Li + Mg(OH) 2  Mg + Li(OH)  General:

#4 Double Replacement  Two elements ____________ partners.  Analogy – Wife Swap  Example: MgCl 2 + NaBr  NaCl + MgBr 2 Na(OH) + H 2 SO 4  NaSO 4 + H(OH)  General:

What type are these??  H 2 + O 2  H 2 O  H 2 O  H 2 + O 2  Zn + H 2 (SO 4 )  Zn(SO 4 ) + H 2  HgO  Hg +O 2  KBr +Cl 2  KCl + Br 2  Ag(NO 3 ) + NaCl  AgCl + Na(NO 3 )  Mg(OH) 2 + H 2 (SO 3 )  Mg(SO 3 ) + H 2 O Note: H 2 O = H(OH)

#5 Combustion AA _____________ (compound composed of Hydrogen & Carbon) reacts with oxygen (usually from the air) (Most people call this process Burning!) IIf combustion is _______________, products will be CO 2 and H 2 O. IIf combustion is _______________, products will be CO and H 2 O.

Examples  C 4 H 10 + O 2  CO 2 + H 2 O (complete - good!)  C 8 H 8 +O 2  CO + H 2 O (Incomplete-Bad!)  General:

Exit Slip Questions H 2 + O 2  H 2 O 1. What type of reaction is this?  Synthesis  Decomposition  Single Replacement  Combustion  Double Replacement

Exit Slip Questions C 4 H 10 + O 2  CO 2 + H 2 O 2. What type of reaction is this?  Synthesis  Decomposition  Single Replacement  Combustion  Double Replacement

Exit Slip Questions NaCl  Na + Cl 2 3. What type of reaction is this?  Synthesis  Decomposition  Single Replacement  Combustion  Double Replacement

Exit Slip Questions Na +KCl  K + NaCl 4. What type of reaction is this?  Synthesis  Decomposition  Single Replacement  Combustion  Double Replacement

Exit Slip Questions MgCl 2 + NaBr  NaCl + MgBr 2 5. What type of reaction is this?  Synthesis  Decomposition  Single Replacement  Combustion  Double Replacement