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

Amount of heat , A 0.5 m 3 rigid tank is filled with saturated liquid wate...

A 0.5 m 3 rigid tank is filled with saturated liquid water at 200 o C. A valve at the bottom of the tank is opened, and liquid is withdrawn from the tank. Heat is transferred to t

Rate of reaction in zero order , Why rate of reaction in zero order is inde...

Why rate of reaction in zero order is independent of concentration? Solution) Where r is the reaction rate and k is the reaction rate coefficient with units of time / concentrat

Define equilibrium state, The chemical reaction at one time the rate of for...

The chemical reaction at one time the rate of forward and backward reaction becomes equal that state is known as Equilibrium state.

Interstitial compounds, what is the interstitial relationship between carbo...

what is the interstitial relationship between carbon and boron?

Hardness, define hardness and its types.

define hardness and its types.

Acidity of alcohol and phenol, observation reaction of alcohol and phenol w...

observation reaction of alcohol and phenol with sodium hydroxide

Hybridization, how find out the correct answer in multiple choice question ...

how find out the correct answer in multiple choice question regarding to complex molecule structure

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