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

Chemical kinetics of the peroxodisulfate ion, Chemical Kinetics of the Pero...

Chemical Kinetics of the Peroxodisulfate Ion The peroxodisulfate  ion is one of the strongest oxidants that are  called, although the oxidation reaction is relatively slow.

How do antiseptics differ from disinfectants? , Antiseptics doesn''t harm l...

Antiseptics doesn''t harm living cells whereas disinfectants harm living cells.and disinfectants are used to sterilize instruments and utensils but cant be used on skin....and  the

Precipitation titrations - types of titrations, Precipitation titrations - ...

Precipitation titrations - Types of titrations The titrations that are based upon the formation of insoluble precipitates, while the solvent of two reacting solution are brough

Which of the following is always a whole number, Which of the following is ...

Which of the following is always a whole number : (1) Atomic weight             (2) Atomic radii     (3) Equivalent weight   (4) Atomic number Ans:  Atomic number

Use the phase rule on system, Q. Consider a system containing only NH 4 Cl(...

Q. Consider a system containing only NH 4 Cl(s), NH 3 (g), and HCl(g). Assume that the equilibrium NH 4 Cl(s) ⇔ NH 3 (g), and HCl(g) exists. (a) Suppose you prepare the system b

.asignment, carbolic acid from benzene

carbolic acid from benzene

Nuclear chemistry, Ask question #Minimum 100 wowhat are isobarsrds accepted...

Ask question #Minimum 100 wowhat are isobarsrds accepted#

Pollution, explain how adsorption as a method of water treatment

explain how adsorption as a method of water treatment

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