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

S block , reason behind the diganol relationship of lithium and magnishim

reason behind the diganol relationship of lithium and magnishim

Calorimetry, 240 g of water at 20 degree C are mixed with a sample of iron ...

240 g of water at 20 degree C are mixed with a sample of iron at 500 degree C. The final temperature of the system is 42 degree C. Find the mass of the iron sample

Transference numbers, a hittorf cell fitted with Ag-AgClis filled with HCl ...

a hittorf cell fitted with Ag-AgClis filled with HCl solution that contains 0.0003856g HCl/g water. A current of 2 mA is passed for exactly 3 hours. the solutions are withdrawn, we

In which form carbon is present in white cast iron?, Cast iron is not appre...

Cast iron is not appreciably malleable at any temperature as cast. The carbon in cast irons may be present in the form of iron carbide or free graphite. White cast iron contains ce

Kinetic theory of gases, The kinetic theory of gases:   The gas laws w...

The kinetic theory of gases:   The gas laws were empirically developed from experimental observations. The kinetic theory of gases assumes that the molecules or atoms of a gas

Kinetic energy, How might temperature changes in the human body have an imp...

How might temperature changes in the human body have an impact on human health

Why there are tie lines for 3 phase equilibrium, Why there are tie lines fo...

Why there are tie lines for 3 phase equilibrium however not for 2-phase equilibrium in a two-component system? Lever rule derived from mass balance gives the relative amounts o

Potentiometry, what is the working principle of potentiometry

what is the working principle of potentiometry

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