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

The maximum energy is present in any electron, The maximum energy is presen...

The maximum energy is present in any electron at: (1) Nucleus      (2) Ground state (3) First excited state (4) Infinite distance from the nucleus Ans: Infinite dis

Calculate the number of photons per second, What is the percentage of light...

What is the percentage of light that is engaged by the sample after a path length of 1 µm? Calculate the number of photons per second absorbed by the sample.   T

Amino acids - biomolecules, Amino acids Proteins are a class of biologi...

Amino acids Proteins are a class of biologically significant substance. They are important to virtually all processes in living systems. A few of acids are hormones that offer

write a shortnote on electrorefining of copper? , Electro refining of Copp...

Electro refining of Copper • Electrolyte - Aqueous copper sulphate solution (acidified) • Cathode - Pure copper metal (thin rod) • Anode - Impure copper metal (thick block) • Disso

Hardness of water, Why does calcium sulphate form scales in high pressure b...

Why does calcium sulphate form scales in high pressure boilers

The ionic character, The covalent compound  HCl has the ionic character as:...

The covalent compound  HCl has the ionic character as: (1) The electronegativity of hydrogen is greater than that of chlorine (2) The electronegativity of hydrogen is equal

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