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Introduction: ELECTROCHEMISTRY Electrochemistry is the area of Chemistry dealing with the interconversion of electrical energy and chemical energy. There are many applications of this in every day life. Batteries, control of corrosion, metallurgy and electrolysis are just a few examples of the applications of electrochemistry. In general, metals tend to make good reducing/oxidizing agents because they can donate or accept electrons. The reducing or oxidizing ability of the metal is given by the electrochemical series. The more active metal is able to reduce the less active metal cation. This electrochemical series is: Li K Ca Na Mg Al possesses negative potential & undergoes oxidation – preferably act as ANODE Zn Cr Fe Ni Sn Pb H2 Cu Hg possesses positive potential & undergoes reduction - preferably act as CATHODE Ag Pt Au So for example, magnesium metal is able to reduce copper (II) ions in solution to form magnesium ions and copper metal: Mg(s) + Cu2+(aq) → Mg2+(aq) + Cu(s) Note: Removal of electron is known as oxidation. Acceptance of electron is known as reduction.PDF Image | ELECTROCHEMISTRY Intro
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