Working of galvanic cell, Chemistry

Assignment Help:

Q Explain Working of Galvanic Cell?

Ans. There are several types of electrochemical cells. One type of electrochemical cell is called a galvanic cell. (A battery is a galvanic cell that is used to do work.)

In this cell, magnesium and copper are the two metal electrodes. They form a metal couple, represented by Mg/Cu. Magnesium, being more reactive than copper, gives up electrons more readily. Thus, magnesium atoms give up electrons that flow from magnesium to copper in the external circuit. When these electrons flow throw the external wire, they illuminate the light bulb.

Let's take a look at the oxidation and reduction half reactions that occur in this galvanic cell:

Magnesium gives up electrons and forms Mg2+ cations. This, this is the electrode that is the anode where oxidation takes place. This oxidation half-reaction is:
Mg ->  Mg+2 + 2e-

  • Copper receives electrons and therefore becomes the electrode that is the cathode where the reduction reaction occurs. This reduction half-reaction is:
    Cu+2 + 2e- ->
    Cu

As the blue copper ions are reduced, they are deposited on the copper metal cathode strip. Consequently, the copper sulfate solution (CuSO4) becomes less blue as the reaction proceeds. The positive sodium ions and the negative chloride ions in the salt bridge restore the charge balance in the individual beakers


Related Discussions:- Working of galvanic cell

What is an oxidizing agent, Any chemical species that has a tendency to acc...

Any chemical species that has a tendency to accept electrons and thereby undergoing reduction themselves is known as an oxidizing agent

What are the advantages of cold working, What are the Advantages of cold wo...

What are the Advantages of cold working (i) No heat is required. (ii) Better surface finish is obtained. (iii) Superior dimension control. (iv) Improved strength and h

The fermi level is, The Fermi level is The highest occupied energy lev...

The Fermi level is The highest occupied energy level at 0 0 K.

Ring substitution in aromatic ethers, Ring substitution in aromatic ethers ...

Ring substitution in aromatic ethers Alkoxy group is ortho and para directing and it directs the incoming groups to ortho and para position. It becomes the aromatic ring leads

Jim, If 4.5 grams of Nitrogen reacted with 2.6 grams of Hydrogen, identify ...

If 4.5 grams of Nitrogen reacted with 2.6 grams of Hydrogen, identify the following: Limiting Reactant- Excess Reactant- and Theoretical Yield:

D block elements, Why do Zr and Hf show similar properties?

Why do Zr and Hf show similar properties?

S block elements, lithium and beryllium markedly differ from other members ...

lithium and beryllium markedly differ from other members of their respstive groups

Characteristics of drinking water, Q.   What are the characteristics of dri...

Q.   What are the characteristics of drinking water?  Sol. Characteristics of drinking water: (1)         It should be colourless and odourless. (2)         It s

Describe the mechanism of ferromagnetism, Describe the mechanism of ferroma...

Describe the mechanism of ferromagnetism Ferromagnetism is the basic mechanism by which certain materials (like iron) form permanent magnets or/and exhibit strong interactions

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd