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