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

S block, list down all the chemical properties of s- block?

list down all the chemical properties of s- block?

Equivalent weight, Equivalent weight of Ca in Ca3(PO4)2 is

Equivalent weight of Ca in Ca3(PO4)2 is

Area required for the evaporator, A single-effect evaporator is used to co...

A single-effect evaporator is used to concentrate 60000 kg h-1 of a 40 wt % NaOH  solution which is fed to the evaporator at 40°C.  The concentrated liquid is a 55 wt % NaOH  solut

Boron trihalides are monomeric molecular compounds, The boron trihalides ar...

The boron trihalides are highly volatile; BF 3 (b. p., 173 K) and BCI 3 , (b. p., 260.5 K are gases, BBr 3 a volatile liquid (b. p., 319 K) and Bl 3 a low melting solid (m. p.,

Converting Measurements, Doctors prescribe medicine based upon body weight....

Doctors prescribe medicine based upon body weight. The recommended dose is 5.0 mg antibiotic per kg body weight and the antibiotic is dissolved to form a solution with a concentrat

Explain about phosphprous and its allotropes, Explain about Phosphprous and...

Explain about Phosphprous and its allotrpes White phosphorus - crystalline solid P 4 Red phosphorus - polymeric solid Scarlet phosphorus Violet phosphorus

Determine the ph of lysine buffer, Suppose that lysine is dissolved into a ...

Suppose that lysine is dissolved into a buffer to a concluding concentration of 1 mM. Into this buffer, 80 percent of the lysine's side-chain amines are protonated. Determine the p

Determine the magnitude of the horizontal component, A 4-m long curved gate...

A 4-m long curved gate is located in the side of a reservoir containing water as shown in Figure. Determine the magnitude of the horizontal and vertical components of the force of

Colligative properties, some examples of RELATIVE MOLECULAR MASS OF SOLUTES...

some examples of RELATIVE MOLECULAR MASS OF SOLUTES BY RELATIVE LOWERING OF VAPOR PRESSURE

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