Monday, October 5, 2020


 General Chemistry Index

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.

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.


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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