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Chemical Reactions

Review Chemistry for the GED


A chemical reaction describes the steps leading to a chemical change.

A chemical reaction describes the steps leading to a chemical change.

Architetto Francesco Rollandin, openclipart.org

A chemical reaction is the process that occurs when two or more substances combine to produce a chemical change. The important terms to remember are:


  • chemical equation - name given to the shorthand used to describe the steps of a chemical reaction


  • reactants - the starting materials for a chemical reaction; the substances that combine in the reaction


  • products - the substances that are formed as a result of a chemical reaction


  • chemical reaction rate - the speed at which a chemical reaction occurs


  • activation energy - the external energy that has to be added in order for a chemical reaction to occcur


  • catalyst - a substance that helps a chemical reaction to occur (lowers the activation energy), but does not participate in the reaction itself


  • Law of Conservation of Mass - this Law states that matter is neither created nor destroyed in a chemical reaction. The number of reactant atoms of a chemical reaction will be the same as the number of product atoms.


Now that you have reviewed the concepts of chemistry covered by the GED, are you ready to test yourself to make sure you understand and remember what's important? Take the test...

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