Predicting Products in Chemical Reactions. Steps to Writing Reactions Some steps for doing reactions…
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Predicting Products in Predicting Products in Chemical ReactionsChemical Reactions
Steps to Writing ReactionsSteps to Writing Reactions• Some steps for doing reactions
1. Identify the type of reaction2. Predict the product(s) using the type of
reaction as a model3. Balance it
Don’t forget about the diatomic elements! (HI BrONClF) For example, Oxygen is O2 as an
element.
In a compound, it can’t be a diatomic element because it’s not an element anymore, it’s a compound!
SynthesisSynthesis
Example C + OExample C + O22
OO C + O O C
OO COO C OO C OO C OO
C OO
C OO
CO
O
C OO
C O
O C O
O C OO C
OO C OO C
General: General: A + B A + B AB AB
Synthesis: PracticeSynthesis: Practice• Predict the products. Write and balance
the following synthesis reaction equations.• Sodium + chlorine
Na + Cl2
• Aluminum + fluorine Al + F2
NaNa++ & & ClCl--
11 11
NaCl1122 22
DecompositionDecomposition
Example 2HgOExample 2HgO
O Hg
O Hg
Hg
O O Hg
+
General: General: AB AB A + B A + B
Decomposition: PracticeDecomposition: Practice• Predict the products. Then, write and balance
the following decomposition reaction equations:
• Lead (IV) oxide PbO2
• Aluminum nitride AlN
Is either Is either a diatomic a diatomic molecule?molecule?
Pb + O2
11 11 11
Single replacementSingle replacement
Example: Zn + CuClExample: Zn + CuCl22
ZnClCl Cu +
General: General: AB + C AB + C AC + B AC + B
ClCl Zn Cu+
Practice: Single Practice: Single ReplacementReplacement
• Sodium chloride + fluorine
NaCl + F2
Note that fluorine replaces chlorine in the compound.• Aluminum + copper (II) nitrate Al + Cu(NO3)2
22 22 NaF + Cl11 11
NaNa++ & & FF--
11 11 Is Is
chlorine a chlorine a diatomic diatomic
molecule?molecule?
2
Double replacementDouble replacement
Example: MgO + CaSExample: MgO + CaS
General:General: AB + CD AB + CD AD + CB AD + CB
SOMg Ca+
O S
Mg Ca+
Practice: Double Practice: Double replacementreplacement
Calcium chloride + sodium phosphate
CaCl2 + Na3PO4
Lead II nitrate + barium chloride
Pb(NO3)2 + BaCl2
+Ca3(PO4)2
CaCa2+2+ & & POPO44
3-3-33 22NaNa+ + & Cl & Cl--11 11
NaCl
33 6622 11
Practice: CombustionPractice: Combustion
C5H12 + O2
C10H22 + O2
55 6688 CO2 + H2O
Remember products of combustion are always carbon dioxide and water
11
Mixed PracticeMixed PracticeState the type, predict the products, and balance
the following reactions:
BaCl2 + H2SO4
C6H12 + O2
Zn + CuSO4
Cs + Br2
FeCl3
Images CitedImages Cited http://www.chemistry.ohio-state.edu/http://www.chemistry.ohio-state.edu/
betha/nealChemBal/betha/nealChemBal/ www.mccsc.edu/~nrapp/www.mccsc.edu/~nrapp/
chemistrychemistrypowerpointpowerpoint/Student/Student%20Ch%207%20%20Ch%207%20ChemicalChemical%20%20ReactionsReactions..pptppt
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