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Ch. 8 – Chemical Reactions. Types of Chemical Reactions. Describing Chemical Reactions. Evidence of a chemical change… Production of heat and light Formation of a gas Formation of a precipitate, a solid product. Color change. Describing Chemical Reactions. A+B AB. PRODUCTS. - PowerPoint PPT Presentation
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I II III IV V
Types of Chemical Reactions
Ch. 8 – Chemical Reactions
Describing Chemical Reactions
Evidence of a chemical change… Production of heat and light Formation of a gas Formation of a precipitate, a solid
product. Color change
Describing Chemical Reactions
A+B ABREACTANTS PRODUCTS
Describing Chemical Reactions
A. Combination / Synthesis (marriage) the combination of 2 or more
substances to form a compound
only one product
A + B AB
Mg(s) + O2(g) MgO(s)
A. Combination / Synthesis
Product: Must be a compound
B. Decomposition (divorce)
a compound breaks down into 2 or more simpler substances
only one reactant
AB A + B
H2O2 (aq)
B. Decomposition
Products: Can be elements or compounds
H2O(l) + O2(g)
C. Single Replacement (affair) one element replaces another in a
compound Metal replaces metal Nonmetal replaces nonmetal
A + BC B + AC
Zn(s) + HCl(aq)
C. Single Replacement
H2(g) + ZnCl2(aq)
AB + CD AD + CB
D. Double Replacement (Jerry Springer)
ions in two compounds “change partners” cation of one compound combines with
anion of the other
Pb(NO3)2(aq)+ NaI(aq) PbI2(s)+ NaNO3(aq)
D. Double Replacement
Products: Are compounds Sometimes one of the products is water
E. Combustion
the burning of a hydrocarbon to produce heat
CxHy + O2 CO2 + H2O
E. Combustion
Products:
During complete combustion theproducts are CO2 + H2O
C12H22O11 + 3O2 9C + 3CO2 + H2O
Warm up (practice)
Title: Reaction Types
Number Page (1-5)
1.
2.
3.
4.
5.
1.
Cu(s) + 2AgNO3(aq) Cu(NO3)2(aq) + 2Ag(s)
Single Replacement
2.
2 H2O(l) 2 H2(g) + O2(g)
Decomposition
3.
H2(g) + Cl2(g) 2 HCl(g)
Combination / Synthesis
4.
Pb(NO3)2(aq) + K2CrO4(aq) PbCrO4(s) + 2KNO3(aq)
Double Replacement
5. Combustion
C2H6 + O2 CO2 + H2O