CHEM 10052 Lecture Notes - Lecture 11: Chemical Equation, Nonmetal, Evaporation

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Chemical reaction equations: a symbolic representation of real world events, a given chemical equation functions like a recipe, the amounts used in actual practice do not have to be the except amounts given in the recipe. They just have to be in the proper proportions. Chemical equations must be balanced: required by conservation of mass, for mass to balance, the particles must balance, all atoms or species on one side must be accounted for on the other side. If describing ions, the net charge on each side must be equal. Indirectly provide mass information: 1 mole of particles of an element has a mass equal to the mass listed on the periodic table. Types of chemical reactions: reactions that involve the transfer of electrons-oxidation-reduction or redox reactions, combination, decomposition, combustion, single displacement, complex redox, reactions without transfer of electrons, double displacement, precipitation, acid-base.