CHM 113 Lecture Notes - Lecture 1: Ionic Compound, Chemical Equation, Spectator Ion

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18 May 2017
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One element (typically a metal) replaces another in a compound ab+c cb+a. Zn and mg are changing oxidation numbers this is a production/oxidation. Reduction= process in which substances gain e - (leo ger) Oxidation= process in which substances loses e - (oil rig) Mg is a more active metal then zn. Mg is more likely than zn to lose e - and become a (+) ionic solution. Mg is more likely attractive to the (-) (no 3 ) 2 ions. Activity series: metals of higher activity will replace metals of lower. +2 oxidation number it is losing 2e + activity in a compound. Products are a solid precipitate, a gas of h 2 o. Breaks down (decomposes) into two or more simple substances. Typically requires energy (heat,light,etc. ) but some are spontaneous. Two or more reactants combine to form a compound (opposite of decomposition) Combination/redox reaction where a fuel burns in the presence of an oxidizer (typically o 2 )

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