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?

Ph problems, whats the pH if all i know "5.00mL of 1.30M HCl diluted to 0.4...

whats the pH if all i know "5.00mL of 1.30M HCl diluted to 0.490L "

Fuel - octane, what compounds is used to to change single bonded octane int...

what compounds is used to to change single bonded octane into double bounded high octane

Material, Which chromium plating is more eco-friendly - trivalent or Hexava...

Which chromium plating is more eco-friendly - trivalent or Hexavalent? Justify your answer in the light of environmental issues caused.

Borazine, short note on borazine

short note on borazine

Define post-harvest treatments, Post-harvest treatments Certain post-ha...

Post-harvest treatments Certain post-harvest treatments to fruits and vegetables can bring down spoilage significantly. A wide range of chemicals used to control post-harvest d

LANTHANIDE & ACTINIDES, 1. why YbS and YbI2 are semiconducting solids but ...

1. why YbS and YbI2 are semiconducting solids but LaS and LaI2 show metallic character. 2. Why is aqueous solution of Eu2+ thermodynamically less susceptible to oxidation than any

Principle of atomic emission spectrometry, Principle of atomic emission spe...

Principle of atomic emission spectrometry: The analyte sample is introduced into the centre of the plasma as an aerosol with the help of a nebuliser using argon flow. In the p

PHOTOCHEMISTRY, PHOTO CHEMICAL COMBINATION OF HYDROGEN&IODINE

PHOTO CHEMICAL COMBINATION OF HYDROGEN&IODINE

Chemistry of cereals, The word "cereal" is derived from the name of the Rom...

The word "cereal" is derived from the name of the Roman grain or harvest goddess, Ceres. Cereals are the seeds of the grass family. These are the complex carbohydrates and consist

Difference between phenol and alcohol, Difference between phenol and alcoho...

Difference between phenol and alcohol Property Phenol ( C 6 H 5 OH ) Alcohol ( C 2 H 5 OH ) Odour Typica

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