The Role Of Chemical Reactions And Electricity And Centers Upon The Interrelation Of Chemical Energy And Electrical Energy

1707 WordsJan 22, 20167 Pages
Electrochemistry, a branch of physical chemistry, is the study of the relationship between chemical reactions and electricity and centers upon the interrelation of chemical energy and electrical energy. Contributing to such crucial technological developments as the invention of batteries and fuel cells, corrosion protection and the study of metallurgy, electrochemistry is credited with a great deal of real life applications and has had widespread impact on mankind. One of the most common and fundamental applications of electrochemistry is producing an electric current from a spontaneous redox reaction through the help of a device called the electrochemical cell. For example, if zinc metal is dropped into an aqueous solution of copper ion…show more content…
The electrode placed with the reducing agent is called anode, while the one placed with the oxidizing agent is called cathode. In this case, a strip of zinc metal should be placed in a solution of zinc nitrate and a strip of copper metal should be placed with copper nitrate. As the anode frees electrons where oxidation takes place, the electrons enter an electricity-conducting wire and travel to the cathode where reduction takes place, thereby creating electrical energy. In the meantime of this process, a positive charge and a negative charge accumulate in the oxidation and reduction vessel respectively, due to the transfer of electrons. Since electrons do not have a propensity to travel from a positively-charged region to a negatively-charged region, a salt bridge containing a cation and an anion that do not play a role in the redox reaction, is required to keep this system operating. An U-shaped tube connecting the vessels, the salt bridge releases its cations to the reduction vessel and its anions to the oxidation vessel to maintain the charge neutral. As scientific as this explanation may seem, battery, a ubiquitous product, is modeled after this cell system. “A common example of an electrochemical cell is a standard 1.5-volt battery meant for consumer use”.[ "Electrochemistry." Wikipedia. Accessed January 21, 2016.
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