Redox+reactions

=Redox Reactions (VP, JF):=

Basic info:
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 * Redox stands for Oxidation-Reduction Reactions.
 * Oxidation means loss of electrons.
 * Reduction means gain of electrons. It can be easily remembered because gaining electrons reduces charge.
 * Redox reactions are single replacement reactions requiring the exchange of electrons.
 * Two pneumonic devices to remember what oxidation and reduction mean:

Activity Series:

 * The activity series shows whether or not a single replacement will occur.
 * If the element wishing to replace the cation in a compound is higher in the activity series, a single replacement reaction will occur.

http://www.jesuitnola.org/upload/clark/refs/act_series.gif

Cu(s) + 2AgNO3 (aq) → Cu(NO3)2 (aq) + 2 Ag(s)

In this reaction, elemental copper is replacing silver ions in the solution of silver nitrate because copper is higher on the activity series than silver. Copper gives up two of its electrons, making the charge of both silver atoms zero, and giving copper a charge of 2+. Copper is oxidized (Reducing agent) Silver is reduced (Oxidizing agent)

http://www.saskschools.ca/curr_content/chem30_05/graphics/6_graphics/redox_animation2.gif