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

Physical properties of formic acid, Physical properties of Formic Acid ...

Physical properties of Formic Acid (a) Formic Acid is a pungent smelling and colourless liquid. (b) Formic Acid melts at 8.4° C and boils at 100.5° C . (c) Formic Acid i

Infrared spectroscopy, how we determine the compound is ir active or not . ...

how we determine the compound is ir active or not . and how we determine the polarity of a compound?

#titleadegree of association and dissociation of solute.., Ask question #Mi...

Ask question #Minimum association and dissociation of solute 100 words accepted#

Static light scattering, The table below gives intrinsic viscosity values e...

The table below gives intrinsic viscosity values explained by viscometry and weight- average molar mass values explained under the similar  conditions by static light scattering

Why is the extraction of copper from pyrites is difficult?, Q)why is the ex...

Q)why is the extraction of copper from pyrites more difficult than that from its oxide ore through reduction? Ans) The Standard free energy of formation of Cu2S is greater than

Mole concept, when 100ml of M/10 h2so4 is mixed with 500ml of M/10 naoh t...

when 100ml of M/10 h2so4 is mixed with 500ml of M/10 naoh then nature or resulting solution and normality of excess of reactant left is

Derive an expression for the standard molar reaction entropy, Q. Derive an ...

Q. Derive an expression for the standard molar reaction entropy of a reaction that can be used to calculate its value from the thermodynamic equilibrium constant and its temperatur

Inorganic, Ask question #Msend your questions inimum 100 words accepted#

Ask question #Msend your questions inimum 100 words accepted#

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