How can we obtain boron, Chemistry

Assignment Help:

Q. How can we obtain Boron?

Boron is- obtained by the red-action of B2O3 with magnesium or sodium B203 is first prepared by strongly katingH3B03 which is obtained by the action of HCI or H2S04 - on a concentrated solution of borax:

NA2B4O7 + 2HCl + 5H2O------------------> 4H3BO3+ 2NaCl

2H3BO3---------------------------------> B2O3+ 3H2O

B2O3+ 3Mg------------------------------> 2B + 3MgO

Pure crystalline boron may be obtained in small quantities by the reduction of BBr3, with H2 on a heated tantalum metal filament at 1275-1475 K.


Related Discussions:- How can we obtain boron

Determine the wavelength of light wave, Q. Determine the wavelength of ligh...

Q. Determine the wavelength of light wave? Ans. The frequency of an infrared wave is 2.07 x 10 14 Hz. What is the wavelength?  c = λv Since we know the speed of light we

Define order of reaction , The order of reaction is the number...

The order of reaction is the number of moles whose concentrations verify the rate of a reaction at a given temperature

Tests of chloroform, Tests of chloroform (a) It gives isocyanide test (...

Tests of chloroform (a) It gives isocyanide test (Carbylamine test). (b) It makes silver mirror with Tollen's reagent. (c) Pure Chloroform does not give white precipitate

Compute the atomic packing factor, Question: (i) Differentiate between...

Question: (i) Differentiate between ionic, metallic, covalent and dipole-dipole bonds. Provide examples in each case. (ii) With regard to electronic con?guration, what do a

Reactivity, y LAH is strong reducing agent than NaBh4?

y LAH is strong reducing agent than NaBh4?

Homolysis bond fission or homolytic, Homolysis bond fission or Homolytic ...

Homolysis bond fission or Homolytic (i) In homolysis bond, the covalent bond is broken in such a way that every resulting species gets its own electron. This is apt to the crea

Half life, A 64-g sample of germanium-66 is left undisturbed for 12.5 hours...

A 64-g sample of germanium-66 is left undisturbed for 12.5 hours. At the end of that period, only 2.0 g remain. What is the half-life of this material? 4. With a half-life of 28.8

Reverse hyperconjugation, Reverse Hyperconjugation : The method of hyper...

Reverse Hyperconjugation : The method of hyperconjugation is as well observed in the system given below, In such type of system the effect operates in the opposite direc

Avogadros gas laws, what mass of oxygen gas exerts a pressure of 475 mm Hg ...

what mass of oxygen gas exerts a pressure of 475 mm Hg in a volume of 1.25L at a temperature of -22C

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