Chapter 12: Oxidation-Reduction Reactions

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20 Terms

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Redox reactions
electrons are transferred from one atom to another
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oxidation
loss of electrons
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reduction
gain of electrons
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half-reactions
redox reaction broken up into two individual reactions
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oxidation number (state)
calculated to find if electrons were transferred
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single replacement (displacement)
atom replaces another in a compound which produces a new atom and compound
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active metals such as Li or Ba
react with water in single-displacement reactions
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active metals that react with water examples
Li, Na, K, Sr, Ba
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Active metals such as Mg or Fe
react with acid but not water in singe-replacement
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active metals that do not react with water examples
Mg, Zn, Pb, Ni, Al
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inactive metals
do not undergo simple single-replacement with water or acids
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inactive metals examples
Ag, Pt, Au, Cu
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electrolytic cells
redox reactions that do not normally occur but can when adding electricity
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galvanic cells
spontaneous redox reaction that can occur without added energy
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electrolysis experiments
adds electrodes to nonspontaneous redox reactions to cause reaction to occur
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cathode
electrode where electrons are supplied
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anode
electrode where oxidation reactions occur
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Faraday’s constant
1 mole electrons = 96,485 coulombs
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thermodynamically favored reaction will create a ____ reading on galvanic cell voltage readings
positive
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combustion
when organic compounds reacts with oxygen which produced carbon dioxide and water