Barium hydroxide

Barium hydroxide
Barium hydroxide
Are common
Systematic ; name	Barium hydroxide
Chem. formula	Ba (OH) 2
Physical properties
condition	solid
Molar mass	171.35474 g / mol
Density	4.5 (20 ° C)
Thermal properties
T. melt.	408 ° C
T. Kip.	780 ° C
T.	1000 ° C
Education enthalpy	-950 kJ / mol
Chemical properties
Water solubility	3.89 (20 ° C)
Classification
Reg. CAS number	17194-00-2
Pubchem
Reg. EINECS number
SMILES
Inchi
RTECS	CQ9200000
CHEBI
UN number	<- UN number ->
Chemspider
Security
Toxicity	Acrid, poisonous.

Barium hydroxide ( barium ice) is an inorganic compound that exhibits strong basic properties . The chemical formula is Ba (OH) ₂ . A saturated aqueous solution of barium hydroxide is called barite water .

Content

Properties

Barium hydroxide under standard conditions is a colorless crystals . Hygroscopic. Not soluble in alcohol , but soluble in water . Forms crystalline hydrates with one, two, seven and eight water molecules. Barium hydroxide is toxic, the MPC is 0.5 mg / m³.

Getting

1. Interaction of metallic barium with water:

${\mathsf {Ba+2\ H_{2}O\longrightarrow \ Ba(OH)_{2}+\ H_{2}\uparrow }}$ ${\ displaystyle {\ mathsf {Ba + 2 \ H_ {2} O \ longrightarrow \ Ba (OH) _ {2} + \ H_ {2} \ uparrow}}}$

2. The interaction of barium oxide with water:

${\mathsf {BaO+\ H_{2}O\longrightarrow \ Ba(OH)_{2}}}$ ${\ displaystyle {\ mathsf {BaO + \ H_ {2} O \ longrightarrow \ Ba (OH) _ {2}}}$

3. Interaction of barium sulfide with hot water :

${\mathsf {BaS+2\ H_{2}O\longrightarrow \ Ba(OH)_{2}+\ H_{2}S\uparrow }}$ ${\ displaystyle {\ mathsf {BaS + 2 \ H_ {2} O \ longrightarrow \ Ba (OH) _ {2} + \ H_ {2} S \ uparrow}}}$

Chemical Properties

1. Interaction with acids to form salt and water ( neutralization reaction ) :

${\mathsf {Ba(OH)_{2}+2\ HBr\longrightarrow \ BaBr_{2}+2\ H_{2}O}}$ ${\ displaystyle {\ mathsf {Ba (OH) _ {2} +2 \ HBr \ longrightarrow \ BaBr_ {2} +2 \ H_ {2} O}}}$

${\mathsf {Ba(OH)_{2}+\ H_{2}SO_{4}\longrightarrow \ BaSO_{4}\downarrow +2\ H_{2}O}}$ ${\ displaystyle {\ mathsf {Ba (OH) _ {2} + \ H_ {2} SO_ {4} \ longrightarrow \ BaSO_ {4} \ downarrow +2 \ H_ {2} O}}}$

2. Interaction with acid oxides to form salt and water :

${\mathsf {Ba(OH)_{2}+\ CO_{2}\longrightarrow \ BaCO_{3}\downarrow +\ H_{2}O}}$ ${\ displaystyle {\ mathsf {Ba (OH) _ {2} + \ CO_ {2} \ longrightarrow \ BaCO_ {3} \ downarrow + \ H_ {2} O}}}$

${\mathsf {Ba(OH)_{2}+\ SO_{3}\longrightarrow \ BaSO_{4}\downarrow +\ H_{2}O}}$ ${\ displaystyle {\ mathsf {Ba (OH) _ {2} + \ SO_ {3} \ longrightarrow \ BaSO_ {4} \ downarrow + \ H_ {2} O}}}$

3. Interaction with amphoteric oxides

4. Interaction with salts

Application

Barium hydroxide in the form of barite water is used as a reagent for SO ₄ ^2– and CO ₃ ^2– ( sulfate and carbonate ions), for purification of vegetable oils and animal fats , as a component of lubricants, to remove SO ₄ ^2– ( sulfate ions ) from industrial solutions , obtaining barium salts, as well as rubidium and cesium hydroxides from their sulfates and carbonates .

Notes

Literature

Chemical Encyclopedia / Redkol .: Knunyants I.L. et al. - M .: Soviet Encyclopedia, 1988. - Vol. 1 (Abl-Dar). - 623 s.

Barium hydroxide
Are common
Systematic name	Barium hydroxide
Chem. formula	Ba (OH) ₂
Physical properties
condition	solid
Molar mass	171.35474 g / mol
Density	4.5 (20 ° C)
Thermal properties
T. melt.	408 ° C
T. Kip.	780 ° C
T.	1000 ° C
Education enthalpy	-950 kJ / mol
Chemical properties
Water solubility	3.89 (20 ° C)
Classification
Reg. CAS number	17194-00-2
Pubchem
Reg. EINECS number
SMILES
Inchi
RTECS	CQ9200000
CHEBI
UN number	<- UN number ->
Chemspider
Security
Toxicity	Acrid, poisonous.