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Chapter Study Guide |
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| Chemical reactions govern the behavior of the world around us. When two or more molecules interact and change chemically, a reaction occurs through the breaking of bonds and the formation of new bonds. Chemical reactions can generally be classified as synthesis, decomposition, single replacement, double displacement, combustion and polymerization. Following the Law of Conservation of Mass, all chemical reactions must be balanced in terms of the number of atoms involved. They should also relay pertinent information about the reaction, such as the state of matter of the reactants and products. The formation of bonds releases energy, and the breaking of bonds requires the input of energy. Based on the reactants and products, some reactions are exothermic while others are endothermic. |
| By the end of this chapter you should be able to:
| • | interpret symbols used in chemical equations;
| • | construct and balance a proper chemical equation;
| • | predict products of a chemical reaction based on the type of reaction;
| • | predict when a precipitate will form as a result of a chemical reaction;
| • | distinguish between an endothermic and exothermic chemical equation; and
| • | calculate the enthalpy change of a reaction using the enthalpies of formation. |
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| 7A: Balancing chemical equations
7B: Chemical reactions
7C: Solubility rules
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| chemical reaction | chemical equation | reactant | product | insoluble | soluble | aqueous (aq) | law of conservation of matter | unbalanced chemical equation | balanced chemical equation | synthesis | decomposition | single replacement | double replacement | precipitate | combustion | hydrocarbon | spectator ion | polymer | polymerization |
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