Physical Science / Unit 5: Chemical Reactions
5.4 Types of Reactions
Notes
| Type | General form | Example |
|---|---|---|
| Synthesis | $\text{A} + \text{B} \rightarrow \text{AB}$ | $\text{2Na} + \text{Cl}_2 \rightarrow \text{2NaCl}$ |
| Decomposition | $\text{AB} \rightarrow \text{A} + \text{B}$ | $\text{2H}_2\text{O} \rightarrow \text{2H}_2 + \text{O}_2$ |
| Single replacement | $\text{A} + \text{BC} \rightarrow \text{AC} + \text{B}$ | $\text{Zn} + \text{2HCl} \rightarrow \text{ZnCl}_2 + \text{H}_2$ |
| Double replacement | $\text{AB} + \text{CD} \rightarrow \text{AD} + \text{CB}$ | $\text{AgNO}_3 + \text{NaCl} \rightarrow \text{AgCl} + \text{NaNO}_3$ |
| Combustion | fuel $+ \text{O}_2 \rightarrow \text{CO}_2 + \text{H}_2\text{O}$ | $\text{CH}_4 + \text{2O}_2 \rightarrow \text{CO}_2 + \text{2H}_2\text{O}$ |
Practice
What type of reaction is $\text{2KClO}_3 \rightarrow \text{2KCl} + \text{3O}_2$?
One reactant breaks into simpler substances.
What type of reaction is $\text{2Mg} + \text{O}_2 \rightarrow \text{2MgO}$?
Two substances combine into one.
Propane burns in oxygen to produce carbon dioxide and water. This is a:
Reaction of a fuel with oxygen releasing energy is combustion.
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