http://www.fordhamprep.org/gcurran/sho/sho/lessons/lesson82.htm
http://staff.imsa.edu/science/chemistry/web/Chemical%20Reactions%20Labrevised.pdf
http://chemicalparadigms.wikispaces.com/Chemical+Reactions
Chemical Reactions:
Reactants
=>
Products
CH4 (g) + O2 (g) => CO2 (g) + H2 O (l)
The number of atoms of each element must be the same
on both sides of the equation.
Physical States
(s)
solid, a precipitate formed
(l)
liquid
(g)
gaseous,
(aq)
aqueous, substance dissolved in water
Types of Chemical Reactions
1. Synthesis
2. Decomposition
3. Single Replacement
4. Double Replacement
5. Combustion
1. Synthesis
Two or more substances react to form a single new substance.
2Mg(s) + O2 (g) => 2MgO(s)
Complete and Balance:
a) Be + O2 =>
b) ___ + ____ => NaCl
c)
Al + S =>
Practice
 1)
 2)
 3)
H2 +
Al +
F2 =>
Cl2 =>
________ + _______ => KBr
2. Decomposition
A single compound breaks down into two or more
simpler products.
2 HI => H2 + I2
Complete:
 a) KClO3 => ____ + ____ + ____
 b) ______ => Li + Br2
3. Single Replacement
One element replaces a similar
one in a compound.
Zn (s) + CuCl2 (aq)=> Cu(s) + ZnCl2 (aq)
Ca + AgI =>
Al + MgCl2
HNO3
+ Al =>
=>
Reactivity of Halogens
F2 > Cl2 > Br2 > I2
F2 +
HCl =>
HCl + I2 =>
Br2 +
AlF3 +
MgI2 =>
Br2 =>
 Simulation Single Replacement Reactions.
 After performing all reactions, write your observations,
write the equations and balance all.
 http://www.chem.iastate.edu/group/Greenbowe/secti
ons/projectfolder/flashfiles/redox/home.html
4. Double Replacement
Involves an exchange of positive ions between
compounds.
NaCl(aq) + Ag NO3(aq) => NaNO3(aq) + AgCl(s)
soluble
insoluble
Pb(NO3)2(aq) + KI(aq) => KNO3(aq) + PbI2(s)
soluble
insoluble
http://web.fccj.org/~smilczan/Two5/DR.html
http://www.fordhamprep.org/gcurran/sho/sho/lessons/lesson82.htm
 Write correct formulas for the products in these
double replacement reactions and balance.
1) CaCl2 (aq) + H3PO4(aq) --->
2) K2CO3(aq)+ BaCl2 (aq)--->
3) Co(OH)3 (aq) + HNO3 (aq) --->
Solubility Rules
 All common compounds of Group I and ammonium ions are soluble.
 All nitrates, acetates, and chlorates are soluble.
 All binary compounds of the halogens (other than F) with metals are
soluble, except those of Ag, Hg(I), and Pb. Pb halides are soluble in hot
water.)
 All sulfates are soluble, except those of barium, strontium, calcium,
lead, silver, and mercury (I). The latter three are slightly soluble.
 Except for rule 1, carbonates, hydroxides, oxides, silicates, and
phosphates are insoluble.
 Sulfides are insoluble except for calcium, barium, strontium,
magnesium, sodium, potassium, and ammonium
5. Combustion
You have seen this type of reaction every time you have used a Bunsen
burner, butane lighter, propane stove or gasoline powered vehicle.
When a hydrocarbon burns in the presence of oxygen, it produces carbon
dioxide and water:
Balance C , H and O
CH4
+
O2 =>
CO2 +
H2O
 1. What is the reaction of combustion of the major component of
gasoline, octane, C8 H18
 2. What is the reaction of combustion of ethanol C2 H5 OH