Explain about extraction of metals, Chemistry

Assignment Help:

Q. Explain about Extraction of metals?

Extraction of metals is very often done by complex formation. For example, the cyanide process for the extraction of silver and gold is well known. Purification of metals is often accomplished by solvent extraction of neutral complexes. Commonly encountered ligands for such purposes are oxine, acac, dmg, salicylaldoxime or salicyldineimines. The role of complexes as catalysts in the production of organic chemicals is yet another field of importance. For example various complexes of copper, silver, mercury, ruthenium, cobalt etc. are known to be good catalysts for hydrogenation process [RhCI (PPh3)3], tris (tripheny1phoshine) chlororhodium(1) is one of the best known and thoroughly  investigated compounds. Similarly, oxidation, polymerisation, hydroformylation of olefins all involve the formation of complexes as intermediates. However, quite often they are not simple complexes rather they are organometallic compounds.


Related Discussions:- Explain about extraction of metals

Uses of glucose - biomolecules, Uses of Glucose (a) Glucose is used in ...

Uses of Glucose (a) Glucose is used in the conservation of fruits and making of jams and jellies. (b) Glucose is used in the preparation of confectionary and as a sweetening

Lithium aluminum hydride, Lithium aluminum hydride Lithium aluminum hy...

Lithium aluminum hydride Lithium aluminum hydride reduces the carbonyl group to an alcohol.

Polarization, what is meant by polarizability

what is meant by polarizability

What are fuel cells and reactions takes place in it?, In recent years, the ...

In recent years, the scientists have designed the cells which convert chemical energy of a fuel directly into electrical energy. These cells are called fuel cells. These are the vo

Corey-house reaction, assignment in the topic of corey house reaction

assignment in the topic of corey house reaction

Orbital angular momentum for a d-electron, Orbital angular momentum for a d...

Orbital angular momentum for a d-electron is: (1) 6h/ 2Π             (2) √6/ 2 Π (3) 12 h/ 2Π (4)  √12h/ 2Π Ans:  √6/ 2 Π

Titration, How are standard solutions prepared in industries?

How are standard solutions prepared in industries?

Ionic radii, Ionic Radii   The experimentally calculated anion-cation...

Ionic Radii   The experimentally calculated anion-cation distances in highly ionic solids have to be interpreted on the assumption that each and every ion has a nearly fixed

The following occurs when two hydrogen atoms bond, This of the following oc...

This of the following occurs when two hydrogen atoms bond with each others: (1) Potential energy is lowered (2) Kinetic energy is lowered (3) Electronic motion ceases

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