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  Home >> Inorganic Chemistry Dictionary >> Bosch process, Bromination

Boron trichloride
A fuming liquid which may be by prepared passing dry chlorine over heated boron. It is rapidly hydrolysed by water:
BCI3 + 3H2O 3HCI+H3CO3

Borosilicate
Refers to any of a large number of substances in which BO3 and SiO4 units are linked to form networks with a wide range of structures

Bromide
A compound of an element and bromine. The metal bromides are generally ionic in nature and non-metals are covalent in nature.

Bosch process
It is an industrial method for the preparation of hydrogen. Water gas (CO+H2) is mixed with steam and passed over heated catalyst. The carbon monoxide gets converted to carbon dioxide which is then removed by dissolving in water under pressure.

Bouvealt-Blanc method
A laboratory method for preparing alcohols by reduction of esters utilizing sodium dissolved in alcohol.

Brass
A group of alloys consisting of copper and zinc. A typical yellow brass might contain  about 67% copper and 33% zinc.

Braunite
Brown Mn2O3 containing some SiO2. Used as a source of manganese and as a colourizing agent for bricks and pottery.

Bromide (V) acid
(HBrO3), a colourless liquid made by the addition of dilute sulphuric acid to barium bromate. It dissociates extensively in aqueous solution and is a strong acid.

Brazing metal
Refers to soldering

Bredt’s rule
A double bond cannot be introduced at the bridegehead carbon of a bridget bicyclic or polyclic system with small or medium – sized rings

Brillouin zones
Electronic theory of metals divides the electronic states of a metal into series of broad energy levels known as Brillouin zones.

Brittle
Any solid that easily breaks into small pieces under a force e.g., glass

Bromic (v) acid (HBrO)3
Refers to a colourless liquid made by the addition of dilute sulphuric acid to barium bromate. It dissociates extensively in aqueous solution and is a strong acid.

Bromates
Slats containing bromine oxyanions, hypobromates, (BrO) etc.

Bromination
Refers to a chemical reaction in which a bromine atom is introduced into a molecule.

Bromine acid (HBrO3)
Obtained by treating aqueous barium bromate with a calculated quantity of dilute sulphuric acid.

Bromine symbol Br
A halogen element: a.n. 35; r.a.m 79.909; r.d. 3.13; m.p. – 7.20C; b.p.-58.780C. It is a red volatile liquid at room temperature, having a red brown vapour. Bromine is obtained from brines by displacement with chlorine. Large quantities are used to make 1, 2-dibromoethane as a petrol additive. The element was discovered in 1826 by Antoine Balard.

Bromine trifluoride (BrF3)
A colourless fuming liquid (b.p. 400k) it is highly reactive and many metals and nonmetals when dropped in it catch fire.

Bronze.
An alloy of copper and tin, usually containing form 1 to 10% tin; special types contain from 5 to 10% aluminium (aluminium bronze); fractional percentages of phosphorus (phosphor bronze) as deoxidizer; or low percentages deoxidizer; or low percentages of silicon (silicon bronze).

 

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