Unit 8: Chemical Reactions

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Unit 8 Chemical Reactions
Types of Chemical Reactions Double Replacement
and Combustion
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Predicting Products

• Double Replacement Two compounds react to form
  two new compounds
• Common form

Compound Compound ? Compound Compound AB CD
? AD CB
heat
Pt
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Examples of double replacements

• copper (I) beryllium ?
• sulfate oxalate

copper (I) beryllium oxalate
sulfate
Do not use the activity series for these
reactions!
heat
Pt
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Examples of double replacements

• A neutralization reaction is a type of double
  replacement reaction.
• Neutralization reaction Is a reaction between an
  acid and a base (base a metal hydroxide, ex
  NaOH)

heat
Pt
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Example of a neutralization

• aluminum nitric ?hydroxide acid
  

hydrogen nitrate
aluminum water nitrate
Water will always be a product!
heat
Pt
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Predicting Products

• Combustion A reaction with oxygen (O2)

If your reactant contains The product will be
C CO2
H H2O
S SO2
N N2
heat
Pt
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• Examples Predict the products and balance.
• ___ CH4 ___O2 ?

2
2
___CO2
___H2O
C
1
1
4
2
4
H
O
2
3
4
4
Tip Balance the O2 last.
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• Examples Predict the products and balance.
• ___H3N ___O2 ?

4
3
6
2
2
1.5
3
___N2
___H2O
H
3
2
6
6
12
12
4
1
4
2
2
N
O
2
1
6
3
6
Tip Put the ideal decimal coefficient, then
double all coefficients to balance!