Predicting Chemical Reactions
Thursday, October 06, 2011
3:30 PM
Learning Outcomes
1. Describe the four major classes of chemical reactions
Classes of Chemical Reactions
• Decomposition
• Combination
• Single Displacement
• Double Displacement
Decomposition
General Equation: CD --> C + D
Example Reaction: NH4Cl(s) --> NH3(g)+HCl(g)
Combination
General Equation: A+B --> AB
Example Reaction: H2(g) + CO(g) --> H2CO(g)
Single Displacement
General Equation: A + BC --> AC + B
Example Reaction: Zn(s) + CuCl2(aq) --> Cu(s) + ZnCl2(aq)
Double Displacement
General Equation: AD + BC --> AC + BD
Example Reaction: CuCl2(aq) + Na2S(aq) --> 2 NaCl(aq) + CuS(s)
PROBLEMS
Balance and classify the following reactions
A. GaH3 + N(CH3)3 --> (CH3)3NGaH3
B. Ca(s) + H2O(l) --> Ca(OH)2(aq) +H2(g)
C. N2(g) + CaC2(s) --> C(s) + CaNCN(s)
Chapter 5 Page 1
B.
C.
D.
E.
F.
G.
H.
Ca(s) + H2O(l) --> Ca(OH)2(aq) +H2(g)
N2(g) + CaC2(s) --> C(s) + CaNCN(s)
N2(g) + Mg(s) --> Mg3N2(s)
NH4Cl(s) --> NH3(g) + HCl(g)
CaO(s) + SO3(g) --> CaSO4(s)
PCl5(g) --> PCl3(g) + Cl2(g)
Ca3N2(s) + H2O(l) --> Ca(OH)2(aq) + NH3(g)
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