What is the electrometallurgy, Chemistry

Assignment Help:

Q. What is the Electrometallurgy?

The above two metallurgical processes, namely pyrometallurgy and hydrometallurgy can be used in the extraction of a fairly large number of metals. These processes, thus, cannot be used in cases:

  • Where the metal is extremely reactive, e.g., Li, Na, etc. There are not any chemical-reducing - agents strong enough to make these metals
  • Where the oxide gets reduced only at high temperatures at which preparation of carbides also takes place, e.g., Mg, Al, etc.

In these cases, metals can be extracted by electrolysis of their salts in molten state. Thus, magnesium and sodium are generated by electrolysis of fused chlorides, where the metals re Iiberated at the chlorine and cathode gas is evolved at the anode. Given reactions take place in the mean while electrolysis:

Anode: 2Cl- ---------> Cl2 (g) + 2e

Cathode: 2Na+ 2e ------> 2Na (l)

Mg2+ + 2e---------------> Mg (l)

523_What is the Electrometallurgy.png


Related Discussions:- What is the electrometallurgy

Show occurrence extraction of group 16, Q. Show Occurrence Extraction of gr...

Q. Show Occurrence Extraction of group 16? Oxygen is the most abundant of all elements on earth. Dry air contains 20.946% oxygen by volume in the free form. Oxygen forms about

Show experimental observations of werners theory, Q. Show Experimental obse...

Q. Show Experimental observations of werners theory? Werner showed that his postulates are consistent with experimental observations. He made use of basically three kinds of ex

Explain the major modes of food deterioration, Major modes of food deterior...

Major modes of food deterioration During storage and distribution, foods are exposed to a wide range of environmental conditions. Environmental factors such as temperature, hum

Test of proteins - xanthoproteic test, Test of proteins - Xanthoproteic tes...

Test of proteins - Xanthoproteic test Xanthoproteic test : A few proteins give yellow colour along with concentrated nitric acid (formation of yellow stains on fingers when wor

Why we use boron, Q. Why we use Boron? Boron is used to increase the ha...

Q. Why we use Boron? Boron is used to increase the hardness of steels. Crystalline boron is used in transistors. Boron is a good neutron absorber and is used as shields and con

Explain the triene, The triene contains two diene units with one double bon...

The triene contains two diene units with one double bond common to both. The dienophile reacts with the diene unit that is locked in an s-cis conformation.

What happens if lattice energy increases, a) The Strength of ionic bond ...

a) The Strength of ionic bond b)  Stability of the Ionic compound c)  Ease of formation of the Ionic bond enhances

The ph scale, The pH scale: The equation: p Kw =14.00=pH+pOH is obtaine...

The pH scale: The equation: p Kw =14.00=pH+pOH is obtained by taking the negative logarithm to the base 10 of the autoprotolysis equation, where In general pX denotes -

Construct a thermodynamical born-haber-cycle, Use the given data to constru...

Use the given data to construct a thermodynamical Born-Haber-cycle of the formation of potassium chloride from its elements and calculate the lattice energy of potassium chloride.

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