Write a shortnote on electrorefining of copper? , Chemistry

Assignment Help:

Electro refining of Copper

  • Electrolyte - Aqueous copper sulphate solution (acidified)
  • Cathode - Pure copper metal (thin rod)
  • Anode - Impure copper metal (thick block)
  • Dissociation of copper sulphate -


 Cathode pure thin sheet of copper lined with graphite so that the deposited copper can be
removed easily.
Anode blister copper (got above)

Electrode reaction
Copper sulphate dissociates
CuSO4 ------------Cu2+ + SO42-

H2O -------- H+ +OH

At the cathode the copper ion changes to copper atom by gaining two electrons which
get deposited in the pure copper rod.
Cu2+ +2e- ------- Cu
The sulphate ion and hydroxide ion move towards anode but none of them is discharged.
The copper anode itself loses electrons and gives copper ion in the solution.

At the anode Cu - 2e------- Cu2+
The impure block of copper thus will be used The impurities settles at the bottom of the
electrolytic cell. This is known as anode mud or slime.
The impurities iron, zinc etc ionize and dissolves in the copper sulphate solution. They are above copper in the activity series. So they can displace copper from copper sulphate solution.
The weight of cathode will increase. The copper obtained is 100%pure.e

 


Related Discussions:- Write a shortnote on electrorefining of copper?

EDTA, WHAT IS THE PRINCIPLE OF EDTA TITRATION N?

WHAT IS THE PRINCIPLE OF EDTA TITRATION N?

F block, Write the electron configuration for Tl why do we use F block and ...

Write the electron configuration for Tl why do we use F block and how do i count the subshells in that case?

Explain the working of chemical cell, Q. Explain the working of chemical ce...

Q. Explain the working of chemical cell ? Ans. A  chemical cell  can be set up by dipping two different metals in an electrolyte and connecting the two metals with an external

Plunck''s quantum theory of radiation, which of the following is not a char...

which of the following is not a characteristic of plunck''s quantum theory of radiation? A) Radiation are associated with energy B) A body can emit less or more than a quantum of e

Estimation of protein, what is the concentration of ammonium sulphate solut...

what is the concentration of ammonium sulphate solution and how it is prepared?

Explain lewis base and a nucleophile, Explain Lewis base and a nucleophile ...

Explain Lewis base and a nucleophile Species A is a. Carbon B is an electrophile. Carbon C is a leaving group towards carbon B but also a nucleophile towards carbon D. Carbon D

Water, what will you observe if you freeze water at 4 degree celcious

what will you observe if you freeze water at 4 degree celcious

The statements, The statements: (1)  In filling a group of orbitals of equ...

The statements: (1)  In filling a group of orbitals of equal energy, it is energetically preferable to assign electrons to empty orbitals rather than pair them into a particular o

Lithium fluoride is less soluble in water, Lithium Fluoride is less soluble...

Lithium Fluoride is less soluble in water. But in some ways consider that when Lithium Fluoride dissolve in water, an alkaline solution will find. can u please explain that why thi

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