Unit: Chemical Reactions
Types of Chemical Reactions: Double Replacement and Combustion
Day 6 - Notes
Day 6 - Notes
After today you will be able to…
• Identify a double replacement and combustion reaction
• Predict the products in words for single replacement reactions
• Predict the products in formulas for a combustion reaction
• Balance combustion reactions
Predicting Products
4. Double Replacement: Two compounds react to form two new compoundsCommon form:Compound + Compound Compound
+CompoundAB + CD AD + CB
Examples of double replacements:
copper (I) + beryllium sulfate oxalate
copper (I) + beryllium oxalate sulfate
Do not use the activity series for these reactions!
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)
Example of a neutralization:
Neutralization reactions are a special type of double replacement between an acid and a base that produces Salt (ionic compound) plus water).
aluminum nitric hydroxide + acid
aluminum + water nitrate
Water will always be a product!
hydrogen nitrate
Predicting Products
5. Combustion: A reaction with oxygen (O2)If your reactant
contains:The product will
be:
C CO2
H H2O
S SO2
N N2
Examples: Predict the products and balance.
___ CH4 + ___O2 CH
14
12
2 2
4
___CO2 + ___H2O
O2 3
Tip: Balance the O2 last.
4 4
Examples: Predict the products and balance.
___H3N + ___O2 HN
31
22
2 36
+ ___N2
___H2O
O2 1
Tip: Put the ideal decimal coefficient, then double all coefficients to
balance!
6
32
1.54 3 6 2
12 124 46 6