Explain nerst equation., Chemistry

Assignment Help:

The tendency to metal to lose electrons or tendency of its ions to gain electrons depends upon the concentration of the ions in solution. At the same time, the tendency to lose or gain electrons is expressed in terms of electrode potentials. The value of electrode potential, thus, varies with the variation in the concentration of the ions. The quantitative relationship between the concentration of ions and electrode potentials is given by Nerst equation. For a common electrode reaction:


Mn+ + ne-  2085_nerst equation.png  M

The nerst equation can be written in the two ways as

1027_nerst equation1.png  + (RT/nF) In [Mn+]/[M]

Or, 1027_nerst equation1.png - (RT/nF) In [Mn+]/[M]


In the present aspect, only the first form will be used in the further discussion. Converting natural logarithm (In) to log10 in the first expression, we get

1027_nerst equation1.png  + (2.303 RT/nF) log [Mn+]/[M],

Where, 1872_nerst equation2.png = electrode potential


714_electrochemical3.png  = standard electrode potential with reference to SHE when concentration of Mn+ is 1 mol L-1

R = 8.314 JK-1 mol-1;

T = temperature

[Mn+] = molar concentration of ions;

n = number of electrons gained

F = Faraday constant 96500 C mol-1;

[M] = concentration of metal

Substituting these values, we get

632_nerst equation3.png  log [Mn+]/[M]

1868_electrochemical3.png =  + (0.059/n) log [Mn+]/[M]

In general, for any electrode,

Ered = 2015_nerst equation4.png + (0.059/n) log [oxidized state]/[reduced state]

 

 

 

 

 

 

 

 

 


Related Discussions:- Explain nerst equation.

Homologous, what do you mean by homologous series .

what do you mean by homologous series .

Calculate heat energy required, Calculate how much heat energy is required ...

Calculate how much heat energy is required to raise the temperature of a cube of copper of side 2cm. from 300 to 320k. given: density=8933kg/m cube , atomic weight=63.55, cp=24j/k/

Important synthetic rubbers: nitrite rubbers , Nitrite rubbers (Gr-A or Bun...

Nitrite rubbers (Gr-A or Buna-N or NBR): Nitrite rubber is prepared by the copolymerization of butadiene and acrylonitrile in emulsion systems. Properties: 1.

Subliamtion, By who can sublimation be useful? How can it be useful?

By who can sublimation be useful? How can it be useful?

Distinguish by chemical test, primary and secondary nitro compounds chemi...

primary and secondary nitro compounds chemical test..

Hardness of water, (a) What is hardness of water? What do you understand ...

(a) What is hardness of water? What do you understand by temporary and permanent hardness?                                                            OR Explain tempora

Complexation behaviour of the f-block, Q. Complexation Behaviour of the f-b...

Q. Complexation Behaviour of the f-block? Ions of actinide and lanthanide elements have a strong tendency to form complexes with a variety of oxygen and nitrogen donor ligands.

Conductometric titration, explanation of the conductometric curve plotted f...

explanation of the conductometric curve plotted for AgNO3 and KCL

The maximum number of electrons, The maximum number of electrons accommodat...

The maximum number of electrons accommodated in 5f  orbitals are: (1) 5             (2) 10         (3) 14             (4) 18 Ans:  14

Which of the following orbital is not possible, Which of the following orbi...

Which of the following orbital is not possible: (1) 3 f             (2) 4 f            (3)5 f       (4) 6 f Ans: 3 f

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