Transcript Reaction Symbols

Synthesis Reactions
• 2 H2 + O2  2 H2O
• Two or more reactants combine
to form one new product.
Synthesis Reactions
• Example:
• Sodium metal and Chlorine Gas
combine to yield Sodium Chloride:
2 Na +
Cl2
2 NaCl
Click here for a synthesis
reaction video.
Decomposition Reactions
• 2 H2O2  2 H2O + O2
• One reactant breaks apart and
becomes two or more products.
Click here for a decomposition
reaction demo.
Decomposition Reactions
• Example:
• Aluminum Oxide decomposes to
yield Aluminum Metal and Oxygen
Gas:
2 Al2O3
2 Al + 3 O2
4
Combustion Reactions
• CH4 + 2 O2  CO2 + 2 H2O
• A hydrocarbon is usually burned
with Oxygen gas to produce Carbon
Dioxide & Water.
Combustion Reactions
• Hint for balancing…
2 C4H10 + 6.5
13 O2  8
4 CO2 + 10
5 H2O
Double the reaction!!!
Single Displacement Rxns
• Or Single Replacement
• Li + NaCl  LiCl + Na
• The single element replaces an
element in the compound to form a
new compound.
Click here for a single
displacement demo.
Single Displacement Rxns
•
•
•
•
•
Metal replaces metal
Cu + 2 AgNO3  Cu(NO3)2 + 2 Ag
Or nonmetal replaces nonmetal
Example:
F2 + CaCl2  CaF2 + Cl2
Double Displacement Rxns
• Or Double Replacement
• NaCl + KBr  NaBr + KCl
• Two compounds are the
reactants and the metals switch
with one another.
Double Displacement Rxns
• Watch out for Hydrogen,
sometimes it acts as a metal!
• NaOH + HCl  NaCl + H2O
Double Displacement Rxns
• When in lab,
these reactions
can produce
precipitates,
which are solid
particles mixed
in a liquid.
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Double Displacement Rxns
Click here for a
precipitation demo.
Click here to go to
the Live Chem virtual
reactions webpage.
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ortfolio/text_images/FG19_P757-1a.JPG]