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+ + SO2-4

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?

Reference solution, Reference solution:   A proper reference soluti...

Reference solution:   A proper reference solution contains color reagent plus sample buffer. The difference between the reference and a sample is that the concentration of

Explain the term acceptance tests, Acceptance tests What are Acceptanc...

Acceptance tests What are Acceptance Tests? Acceptance tests are used to evaluate product acceptability or liking or to determine which of a series of products is the most acc

Analgesics - narcotics and non-narcotics, Analgesics - Narcotics and Non-na...

Analgesics - Narcotics and Non-narcotics Analgesics: Drugs which are relieved or decrease pain are known as analgesics. These are of two types, (i) Narcotics: These are majo

Law , explain law of equivalence..

explain law of equivalence..

What is hydrate isomerism, Q. What is Hydrate Isomerism? In a compound,...

Q. What is Hydrate Isomerism? In a compound, water molecules may be present in either coordinated form or as water of crystallisation In the former case water  molecules are di

Calculate the initial radical, (a) Given the values below, calculate the co...

(a) Given the values below, calculate the concentration of benzoyl peroxide required to prepare polystyrene with a number average molar mass of 400,000 by bulk free radical polymer

Steric effect, steric effect affecting the end product of organic compound

steric effect affecting the end product of organic compound

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