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snc2d 08 key concepts-unit 2

SNC2D Lesson 8
Key concepts
Key concepts
Catalyst: a substance that speeds up a chemical reaction without getting used up in the process.
Combustion reaction: the burning of a substance. Complete combustion occurs when sufficient
oxygen is present and produces carbon dioxide and water. Incomplete combustion occurs when
insufficient oxygen is present and produces carbon dioxide, water, carbon, and carbon monoxide.
Decomposition reaction: a reaction in which a compound breaks down into two (or more) new
substances. The products can be elements or compounds, depending on the chemicals involved.
Double-displacement reaction: a reaction in which the second (non-metal) half of one compound
switches with the second half of the other compound to create two new compounds
Hydrocarbon: a compound consisting of hydrogen and carbon atoms, often used as a source of fuel
Law of Conservation of Mass: states that the mass does not change during a chemical reaction.
The mass of the products is equal to the mass of the reactants.
Single-displacement reaction: one atom takes the place of another in a compound
Synthesis reaction: a compound being synthesized from two single elements (also called a
combination reaction)
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