Kotz Ch04 Web - Chemical Equations and Stoichiometry...

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Chemical Equations and Stoichiometry
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Methane reacts with oxygen to form carbon dioxide and water Chemical Equations
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Indicate the physical states of the matter
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Balancing Chemical Equations SO 2 (g) + O 2 (g) SO 3 (g) P 2 O 5 (s) + H 2 O (l) H 3 PO 4 (aq) CH 4 (g) + Cl 2 (g) CCl 4 (l) + HCl (g) Al 4 C 3 (s) + H 2 O (l) Al(OH) 3 (s) + CH 4 (g) C 4 H 10 O (l) + O 2 (g) CO 2 (g) + H 2 O (g) Fe(OH) 3 (s) + H 2 SO 4 (aq) Fe 2 (SO 4 ) 3 (aq) + H 2 O (l) Mg 3 N 2 (s) + H 2 SO 4 (aq) MgSO 4 (aq) + (NH 4 ) 2 SO 4 (aq)
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Chemical Reactions To be correct, the equation that represents a chemical reaction must conserve both mass and charge, i.e., it must be balanced. Chemical reactions fall into two major categories: 1. Electron transfer: change in oxidation state of one or more elements in the reaction. Called red uction and ox idation: Called Redox reactions 2. No electron transfer: No change in oxidation state. Types of Reactions - Part I. Combination Reactions Decomposition Reactions Combustion Reactions
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Elemental Combination (redox): Two or more substances react to form one product. For prediction purposes, the positive oxidation state species is usually in the product and is usually in the highest positive oxidation state for that element [sulfur (S) is an exception]. Decomposition Reactions : One reactant reacts to produce two or more products (the reverse of combination rxns).
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Combustion Reactions : Normally involve reaction with O 2
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Kotz Ch04 Web - Chemical Equations and Stoichiometry...

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