Galvanic Cells: Difference between revisions

Latest revision as of 23:06, 5 December 2015

Currently, it is not possible the potential difference between a strip of metal and a solution where the metal is dipped in. This arrangement is known as a galvanic cell and the situation can be represented as an oxidation-reduction (redox) reaction equation. A typical call consists of two strips of metal (one zinc and the other copper) and they are usually dipped in a solution containing salt from the corresponding metal. The two sides are separated by a porous barriers; this is because it avoids the two mixers from mixing at a fast rate but still allows the ions to diffuse from both sides. The set up can be seen in the picture.

The Main Idea

Oxidation – reduction reactions are very useful when it comes to calculating electrical energy in batteries. A basic electrochemical cell can be made with copper and zinc metals and solutions of their sulfates. During this reaction, the electrons from the zinc will be transferred to the copper through an electric conducting path (electric current). The more basic version of a galvanic cell is called an electrochemical cell; the difference is that galvanic cells can generate electric current.

Half cell reaction in its simplest form consists of an electrode (solid metal) which is immersed in a solution that has cations from the metal and anions to neutralize the charges. A galvanic cell has two-half cells; where one of the half cells is composed of metal A and the electrode of the other half-cell is composed of metal B; the equation would be:

A^n+ + ne- --> A

B^m+ + me- --> B

The two electrodes are connected with a metal wire which conduct the electrons that participate. The electrode are connected with a metal wire in order to allow the electrons to transfer and participate in the reaction.

History

Scientist, Luigi Galvani discovered that two different metals , copper and zinc, when connected to a frog leg’s nerve made the nerve twitch. After this discovery, Alessandro Volta invented the voltaic pile which consisted a very similar set up to the galvanic cells. Carlo Matteucci constructed a battery entirely out of biological matter and all these discoveries added up to the invention of the electrical battery in 1999.

Examples

External links

http://www.chem1.com/acad/webtext/elchem/ec2.html

References

http://www.sparknotes.com/chemistry/electrochemistry/galvanic/section2/page/2/

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 A^n+ + ne- --> A
 B^m+ + me- --> B
+The two electrodes are connected with a metal wire which conduct the electrons that participate. The electrode are connected with a metal wire in order to allow the electrons to transfer and participate in the reaction.
+[[File:Galcel.jpg]]
-===A Mathematical Model===
+==History==
-What are the mathematical equations that allow us to model this topic.  For example <math>{\frac{d\vec{p}}{dt}}_{system} = \vec{F}_{net}</math> where '''p''' is the momentum of the system and '''F''' is the net force from the surroundings.
-===A Computational Model===
-How do we visualize or predict using this topic. Consider embedding some vpython code here [https://trinket.io/glowscript/31d0f9ad9e Teach hands-on with GlowScript]
+Scientist, Luigi Galvani discovered that two different metals , copper and zinc, when connected to a frog leg’s nerve made the nerve twitch. After this discovery, Alessandro Volta invented the voltaic pile which consisted a very similar set up to the galvanic cells. Carlo Matteucci constructed a battery entirely out of biological matter and all these discoveries added up to the invention of the electrical battery in 1999.
 ==Examples==
-Be sure to show all steps in your solution and include diagrams whenever possible
-===Simple===
-===Middling===
-===Difficult===
-==Connectedness==
-#How is this topic connected to something that you are interested in?
-#How is it connected to your major?
-#Is there an interesting industrial application?
-==History==
-Put this idea in historical context. Give the reader the Who, What, When, Where, and Why.
-== See also ==
-Are there related topics or categories in this wiki resource for the curious reader to explore?  How does this topic fit into that context?
 ===Further reading===
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 ===External links===
-[http://www.scientificamerican.com/article/bring-science-home-reaction-time/]
+http://www.chem1.com/acad/webtext/elchem/ec2.html
 ==References==
-This section contains the the references you used while writing this page
+http://www.sparknotes.com/chemistry/electrochemistry/galvanic/section2/page/2/
 [[Category:Which Category did you place this in?]]