Where are we going with this? This page will assist in developing the ability to describe, classify, and give examples of various kinds of reactions: synthesis (i.e., combination), decomposition, single displacement, double displacement, acid/base, and combustion.
Decomposition
You start with something. It breaks apart.
You start with something. It breaks apart.
Decomposition occurs when a compound breaks down into two or more substances.
What this looks like:
AB --> A + B
One bigger thing breaks up into two (or more) smaller things.
- In decomposition, the substance that comes apart (the reactants) must be a compound.
- The product can be compounds or elements.
Examples:
2Ni2O3 --> 4Ni + 3O2
CaCO3 --> CaO + CO2
where the CO2 breaks out leaving the Ca and one O behind.
(Think CaOCO2 --> CaO + CO2 )
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