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?

Mining of petroleum and petroleum refining, Mining of petroleum and Petrole...

Mining of petroleum and Petroleum refining (1) Mining of petroleum: Petroleum deposits takes place at varying depth at different places ranging from 500 to 15000 feet. This is

Explain the heat of formation of the gases, Take these values into account ...

Take these values into account and comment on the relation between the heat of formation of the gases and the vibrational frequencies again.

Determine spherical symmetry, A filled or half-filled set of p or d  -orbit...

A filled or half-filled set of p or d  -orbitals is spherically symmetric. Point out the species which has spherical symmetry: (1) Na                    (2) C

The maximum amount of ba3(po4)2, If 0.5 mol of BaCl 2 is mixed with 0.20 m...

If 0.5 mol of BaCl 2 is mixed with 0.20 mol of Na 3 PO 4 , the maximum amount of Ba 3 (PO4) 2 that can be formed is 3 BaCl 2 + 2 Na3PO 4 = Ba 3 (PO4) 2 + 6NaCl Here cle

PH and DO, does lowered pH of water affect dissolved oxygen?

does lowered pH of water affect dissolved oxygen?

Oxoacids of boron and borates, Orthoboric acid H 3 BO 3 commonly known as ...

Orthoboric acid H 3 BO 3 commonly known as boricacid and Meta boric acid HB0 3 , are two well-known and important oxoacids of boron. On a large scale, H 3 BO 3 is prepared by the

What is peroxodisulphuric acid, Q. What is Peroxodisulphuric Acid? It i...

Q. What is Peroxodisulphuric Acid? It is also known as perdisulphuric acid or simply persulphuric acid. The acid can be obtained  by the action of chlorosulphonic acid on H 2 0

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