Chapter 7.2
Five Basic Types of Reactions
Synthesis Decomposition_________ Replacement_________ReplacementCombustion (very special reactions)
#1 Synthesis Reactions _____ or more reactants combine to make
one product
•Chemical Examples!
Cu + O2 CuO
H2 + O2 H2O
•General:
#2 Decomposition Reactions decompose --- “_________________” one reactant breaks down into _____ or
more simpler products. Examples:
NaCl Na + Cl2
CaCO3 CaO + CO2
General:
#3 Single Replacement One free element ___________another
element in a compound! Analogy- “getting dumped” Examples:
Na + KCl K + NaClLi + Mg(OH)2 Mg + Li(OH)
General:
#4 Double Replacement Two elements ____________ partners. Analogy – Wife Swap Example:
MgCl2 + NaBr NaCl + MgBr2
Na(OH) + H2SO4 NaSO4 + H(OH)
General:
What type are these?? H2 + O2 H2O H2O H2 + O2 Zn + H2(SO4) Zn(SO4) + H2
HgO Hg +O2
KBr +Cl2 KCl + Br2 Ag(NO3) + NaCl AgCl + Na(NO3)
Mg(OH)2 + H2(SO3) Mg(SO3) + H2O
Note: H2O = H(OH)
#5 Combustion A _____________ (compound composed of
Hydrogen & Carbon) reacts with oxygen (usually from the air)
(Most people call this process Burning!) If combustion is _______________,
products will be CO2 and H2O.
If combustion is _______________,
products will be CO and H2O.
Examples C4H10 + O2 CO2 + H2O
(complete - good!) C8H8 +O2 CO + H2O
(Incomplete-Bad!) General: General:
Exit Slip QuestionsH2 + O2 H2O
1. What type of reaction is this? Synthesis Decomposition Single Replacement Combustion Double Replacement
Exit Slip Questions
C4H10 + O2 CO2 + H2O
2. What type of reaction is this? Synthesis Decomposition Single Replacement Combustion Double Replacement
Exit Slip Questions
NaCl Na + Cl23. What type of reaction is this?
Synthesis Decomposition Single Replacement Combustion Double Replacement
Exit Slip Questions
Na +KCl K + NaCl4. What type of reaction is this?
Synthesis Decomposition Single Replacement Combustion Double Replacement
Exit Slip Questions
MgCl2 + NaBr NaCl + MgBr2
5. What type of reaction is this? Synthesis Decomposition Single Replacement Combustion Double Replacement