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Combination Reaction (composition/ synthesis)

Look For: One Product

Example of Combination Reaction

2 H2+O2 -------> 2 H20

Decompostion Reaction

Look for: One Reactant

Example of Decompostion Reaction

CaCO3 --------> CaO+CO2

Single Replacement (Displacement)

Look for: an element by itself on the left side that's taken the place of another in a compound on the right side

Example of Single Replacement

Zn+ CuSO4 -------> ZnSO4+Cu

Double Replacement

Look for: Ionic compounds that switch cations

Example of Double Replacement

3 AgNO3+Al I3 -------> 3AgI+Al(NO3)3

Combustion Reaction

Look for: CO2+H2O as the products

Incomplete Combustion


Left side of the equation


Right Side of the equation


NEVER Change Subscripts ONLY coefficiants


Law of Conservation of Mass

Number of Atoms on left=right

___ Rb+ __Cl2 -----> ____RbCl

2 Rb+ Cl2 -----> 2 RbCl

2 Rb+ Cl2 -----> 2 RbCl


__C2H3+___O2 -------> ___CO2+ ___H2O

2 C2H3+5 O2 ------->4 CO2+ 2 H2O

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