Как пишется бромид кальция

Бромид кальция
Общие
Систематическое наименование Бромид кальция
Традиционные названия Бромистый кальций
Химическая формула CaBr2
Физические свойства
Состояние (ст. усл.) Бесцветные гигроскопические кристаллы
Молярная масса 199,90 г/моль
Плотность 3,353 г/см³
Термические свойства
Температура плавления 760; 765 °C
Температура кипения 806-812 °C
Молярная теплоёмкость (ст. усл.) 75,1 Дж/(моль·К)
Энтальпия образования (ст. усл.) -685 кДж/моль
Химические свойства
Растворимость в воде 14220; 312105 г/100 мл
Классификация
Рег. номер CAS 7789-41-5
Рег. номер PubChem 24608
SMILES [Ca+2].[Br-].[Br-]
RTECS EV9328000

Бромид кальция — бинарное неорганическое соединение кальция и брома с формулой CaBr2. Бесцветные гигроскопичные кристаллы. Образует несколько кристаллогидратов.

Получение

  • Безводную соль получают действием брома на раскалённый оксид кальция:
mathsf{2 CaO + 2 Br_2 xrightarrow{700^oC} 2 CaBr_2 + O_2 }
  • Кристаллогидрат получают действуя бромистоводородной кислотой на оксид кальция, его гидроксид или карбонат:
mathsf{CaO + 2 HBr xrightarrow{ } CaBr_2 + H_2O }
mathsf{Ca(OH)_2 + 2 HBr xrightarrow{ } CaBr_2 + 2 H_2O }
mathsf{CaCO_3 + 2 HBr xrightarrow{ } CaBr_2 + CO_2uparrow + H_2O }

Физические свойства

Бромид кальция образует бесцветные диамагнитные кристаллы ромбической сингонии, пространственная группа P nnm, параметры ячейки a = 0,655 нм, b = 0,688 нм, c = 0,434 нм, Z = 2. При кристаллизации из водных растворов образуются кристаллогидраты CaBr2•6H2O и CaBr2•3H2O. Из неводных растворов выделены разнообразные сольваты, например CaBr2•n NH3 (где n=8, 6, 2, 1), CaBr2•n CH3CH2OH (где n=4, 3, 1).

Химические свойства

  • Бромид кальция реагирует с плавиковой кислотой:
mathsf{CaBr_2 + 2 HF xrightarrow{ } CaF_2 + 2 HBr }

Применение

  • Бромид кальция используется как дегидратирующий агент, катализатор.
  • Концентрированные растворы бромида кальция используются в качестве буровых растворов и теплоносителей в системах охлаждения и кондиционирования воздуха.

Литература

  • Рипан Р., Четяну И. Неорганическая химия. Химия металлов. — М.: Мир, 1971. — Т. 1. — 561 с.
  • Химическая энциклопедия / Редкол.: Кнунянц И.Л. и др.. — М.: Советская энциклопедия, 1990. — Т. 2. — 671 с. — ISBN 5-82270-035-5
  • Справочник химика / Редкол.: Никольский Б.П. и др.. — 2-е изд., испр. — М.-Л.: Химия, 1966. — Т. 1. — 1072 с.
  • Справочник химика / Редкол.: Никольский Б.П. и др.. — 3-е изд., испр. — Л.: Химия, 1971. — Т. 2. — 1168 с.
Источник

Calcium (Ca) is a substance that is important for living creatures, including people. It is the most plentiful mineral in the body and fundamental for good wellbeing. We want to consume a specific measure of calcium to assemble and keep up with solid bones and sound correspondence between the mind and different pieces of the body.

Br is the chemical name of Bromine and is essential for the halogen of the periodic table. The bromine substance Br2 is a rosy earthy colored fluid and is never normally found in its basic structure yet rather in inorganic mixtures, otherwise called bromides, and in regular organo-bromine compounds. These are normally found in soils, salts, air, and seawater.

Calcium bromide

Calcium Bromide is otherwise called Calcium Dibromide. Calcium Bromide is having one calcium particle and two bromine molecules. In its anhydrous structure, it is hygroscopic and dismal gems sharp saline taste. It is a compound known for being utilized in a few boring liquids and food additives. Calcium Dibromide is non-harming to any arrangement. It is synthetically as well as thermally steady. Different arrangements containing chlorides and bromides can be mixed with this compound.

It is created by responding calcium carbonate CaCO3 and calcium oxide with hydrobromic corrosive for example HBr. Calcium bromide isn’t found in nature.

Formula of Calcium Bromide

The Chemical formula of the Calcium Bromide is CaBr2. This compound is ordinarily found as a hydrated salt with two atoms of water and can likewise be found as a hexahydrate salt. It is framed by one cation Ca2+ and two anions Br–. Its design is an octahedron with Ca focuses bound to an aggregate of six anion Br– through ionic bonds.

Structure

Calcium bromide is made from the reaction of calcium oxide with hydrobromic acid. In another manner, we can set it up with the response of metallic calcium and basic bromine:

CaO + 2HBr → CaBr2 + H2O

Ca + Br2 → CaBr2

Properties of Calcium Bromide

  • Calcium bromide is a white hygroscopic powder accessible in its anhydrous structure. Its thickness is 3.35 grams per liter and the liquefying point is 730 degrees C. Its edge of boiling over is 1935°C. Calcium bromide is dissolvable in water, ethanol, methanol, and acetone, however, it is insoluble in natural solvents.
  • Calcium bromide can experience numerous responses. It is helpful for the synthetic business in the development of calcium oxide from calcium bromide and oxygen gas. This response happens at high temperatures to create bromine gas.

Uses of Calcium Bromide

  • It is principally being used as a thick watery answer for boring liquids. Additionally, it has a significant application in as anxieties prescription, food additives, freezing blends, fire retardants, and photography.
  • This salt is being used by food businesses as an additive and as a part of freezing blends. It is likewise valuable as a fire retardant, as a wood additive, and as drying out a specialist.
  • Calcium Bromide is useful in controlling the well bore pressures during completion and workover operations.

Sample questions

Question 1: What are the serious health hazards of Calcium Bromide?

Answer:

Calcium bromide can irritate eyes, redness of eyes, skin and mucous as well. It is extremely poisonous by ingestion, causing sore throat and nausea. Inhalation of calcium bromide causes cough. It isn’t burnable or combustible.

Question 2: What is the molar mass of calcium Bromide?

Answer: 

Its molar mass is,

= 40.078 + 2 × 79.904

= 199.89 gram per mol.

Thus the molar mass of Calcium Bromide is 199.89 gram per mole.

Question 3: Why is calcium bromide ionic?

Answer:

Calcium bromide is made out of metallic calcium and nonmetallic bromine. Metals will quite often shape captions while nonmetals structure anions. Hence, calcium tends to shape a cation, while bromine frames an anion. Together, they structure an ionic compound.

Question 4: Where is calcium bromide found?

Answer: 

This compound is generally found as a hydrated salt with two atoms of water and can likewise be found as a hexahydrate salt.It is formed by one cation Ca2+ and two anions Br–. Its design is an octahedron with Ca focuses bound to an aggregate of six anion Br–  through ionic bonds.

Question 5: What does calcium bromide react with

Answer: 

At the point when firmly heated in air, calcium bromide will respond with oxygen to create calcium oxide and bromine: 

2 CaBr2 + O2 → 2 CaO + 2Br. In this response the oxygen oxidizes the bromide to bromine.

Question 6: What type of component is calcium bromide?

Answer:

Calcium Bromide also known as calcium dibromide is an ionic compound, because the second element is a non-metal, therefore, it will in the form an ionic compound. It is known as a hydrated salt.

Источник

Calcium (Ca) is a substance that is important for living creatures, including people. It is the most plentiful mineral in the body and fundamental for good wellbeing. We want to consume a specific measure of calcium to assemble and keep up with solid bones and sound correspondence between the mind and different pieces of the body.

Br is the chemical name of Bromine and is essential for the halogen of the periodic table. The bromine substance Br2 is a rosy earthy colored fluid and is never normally found in its basic structure yet rather in inorganic mixtures, otherwise called bromides, and in regular organo-bromine compounds. These are normally found in soils, salts, air, and seawater.

Calcium bromide

Calcium Bromide is otherwise called Calcium Dibromide. Calcium Bromide is having one calcium particle and two bromine molecules. In its anhydrous structure, it is hygroscopic and dismal gems sharp saline taste. It is a compound known for being utilized in a few boring liquids and food additives. Calcium Dibromide is non-harming to any arrangement. It is synthetically as well as thermally steady. Different arrangements containing chlorides and bromides can be mixed with this compound.

It is created by responding calcium carbonate CaCO3 and calcium oxide with hydrobromic corrosive for example HBr. Calcium bromide isn’t found in nature.

Formula of Calcium Bromide

The Chemical formula of the Calcium Bromide is CaBr2. This compound is ordinarily found as a hydrated salt with two atoms of water and can likewise be found as a hexahydrate salt. It is framed by one cation Ca2+ and two anions Br–. Its design is an octahedron with Ca focuses bound to an aggregate of six anion Br– through ionic bonds.

Structure

Calcium bromide is made from the reaction of calcium oxide with hydrobromic acid. In another manner, we can set it up with the response of metallic calcium and basic bromine:

CaO + 2HBr → CaBr2 + H2O

Ca + Br2 → CaBr2

Properties of Calcium Bromide

  • Calcium bromide is a white hygroscopic powder accessible in its anhydrous structure. Its thickness is 3.35 grams per liter and the liquefying point is 730 degrees C. Its edge of boiling over is 1935°C. Calcium bromide is dissolvable in water, ethanol, methanol, and acetone, however, it is insoluble in natural solvents.
  • Calcium bromide can experience numerous responses. It is helpful for the synthetic business in the development of calcium oxide from calcium bromide and oxygen gas. This response happens at high temperatures to create bromine gas.

Uses of Calcium Bromide

  • It is principally being used as a thick watery answer for boring liquids. Additionally, it has a significant application in as anxieties prescription, food additives, freezing blends, fire retardants, and photography.
  • This salt is being used by food businesses as an additive and as a part of freezing blends. It is likewise valuable as a fire retardant, as a wood additive, and as drying out a specialist.
  • Calcium Bromide is useful in controlling the well bore pressures during completion and workover operations.

Sample questions

Question 1: What are the serious health hazards of Calcium Bromide?

Answer:

Calcium bromide can irritate eyes, redness of eyes, skin and mucous as well. It is extremely poisonous by ingestion, causing sore throat and nausea. Inhalation of calcium bromide causes cough. It isn’t burnable or combustible.

Question 2: What is the molar mass of calcium Bromide?

Answer: 

Its molar mass is,

= 40.078 + 2 × 79.904

= 199.89 gram per mol.

Thus the molar mass of Calcium Bromide is 199.89 gram per mole.

Question 3: Why is calcium bromide ionic?

Answer:

Calcium bromide is made out of metallic calcium and nonmetallic bromine. Metals will quite often shape captions while nonmetals structure anions. Hence, calcium tends to shape a cation, while bromine frames an anion. Together, they structure an ionic compound.

Question 4: Where is calcium bromide found?

Answer: 

This compound is generally found as a hydrated salt with two atoms of water and can likewise be found as a hexahydrate salt.It is formed by one cation Ca2+ and two anions Br–. Its design is an octahedron with Ca focuses bound to an aggregate of six anion Br–  through ionic bonds.

Question 5: What does calcium bromide react with

Answer: 

At the point when firmly heated in air, calcium bromide will respond with oxygen to create calcium oxide and bromine: 

2 CaBr2 + O2 → 2 CaO + 2Br. In this response the oxygen oxidizes the bromide to bromine.

Question 6: What type of component is calcium bromide?

Answer:

Calcium Bromide also known as calcium dibromide is an ionic compound, because the second element is a non-metal, therefore, it will in the form an ionic compound. It is known as a hydrated salt.

Источник

From Wikipedia, the free encyclopedia

Calcium bromide

Hydrophilite.GIF
Names
IUPAC name

Calcium bromide
Other names

Calcium dibromide
Identifiers

CAS Number
  • 7789-41-5 anhydrous check
  • 22208-73-7 dihydrate ☒

3D model (JSmol)
  • Interactive image
  • Interactive image
ChEBI
  • CHEBI:31338 check
ChemSpider
  • 23010 check
ECHA InfoCard 100.029.240 Edit this at Wikidata
EC Number
  • 232-164-6

PubChem CID
  • 24608
RTECS number
  • EV9328000
UNII
  • 87CNY2EEBH check

CompTox Dashboard (EPA)
  • DTXSID0044577 Edit this at Wikidata

InChI

  • InChI=1S/2BrH.Ca/h2*1H;/q;;+2/p-2 check

    Key: WGEFECGEFUFIQW-UHFFFAOYSA-L check

  • InChI=1/2BrH.Ca/h2*1H;/q;;+2/p-2

    Key: WGEFECGEFUFIQW-NUQVWONBAA

SMILES

  • Br[Ca]Br

  • [Ca+2].[Br-].[Br-]
Properties

Chemical formula

 CaBr2
Molar mass 199.89 g/mol (anhydrous)
235.98 g/mol (dihydrate)
Appearance anhydrous is hygroscopic colorless crystals
sharp saline taste
Density 3.353 g/cm3
Melting point 730 °C (1,350 °F; 1,000 K)
Boiling point 1,815 °C (3,299 °F; 2,088 K) (anhydrous)
810 °C (dihydrate)

Solubility in water

 125 g/100 mL (0 °C)
143 g/100 mL (20 °C)
312 g/100 mL (100 °C)
Solubility in alcohol, acetone soluble
Acidity (pKa) 9

Magnetic susceptibility (χ)

 -73.8·10−6 cm3/mol
Structure

Crystal structure

 rhomboid
Thermochemistry

Heat capacity (C)

 75 J/mol K

Std molar
entropy (S⦵298)

 130 J/mol K

Std enthalpy of
formation (ΔfH⦵298)

 -647.9 kJ/mol

Gibbs free energy (ΔfG⦵)

 -656.1 kJ/mol
Hazards
NFPA 704 (fire diamond)

NFPA 704 four-colored diamond

1

0

0
Lethal dose or concentration (LD, LC):

LD50 (median dose)

 4100 mg/kg (rat, oral)
1580 mg/kg (mouse, subcutaneous)
Related compounds

Other anions

 Calcium fluoride
Calcium chloride
Calcium iodide

Other cations

 Beryllium bromide
Magnesium bromide
Strontium bromide
Barium bromide
Radium bromide

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

☒ verify (what is check☒ ?)

Infobox references

Calcium bromide is the name for compounds with the chemical formula CaBr2(H2O)x. Individual compounds include the anhydrous material (x = 0), the hexahydrate (x = 6), and the rare dihydrate (x = 2). All are white powders that dissolve in water, and from these solutions crystallizes the hexahydrate. The hydrated form is mainly used in some drilling fluids.[1]

Synthesis, structure, and reactions[edit]

It is produced by the reaction of calcium oxide, calcium carbonate with hydrobromic acid or the reaction of calcium metal with elemental bromine.[1]

It adopts the rutile structure, featuring octahedral Ca centres bound to six bromide anions, which also bridge to other Ca centres.

When strongly heated in air, calcium bromide will react with oxygen to produce calcium oxide and bromine:

2 CaBr2 + O2 → 2 CaO + 2 Br2

In this reaction, the oxygen oxidizes the bromide to bromine.

Uses[edit]

It is mainly used as dense aqueous solutions for drilling fluids.[1] It is also used in neuroses medication, freezing mixtures, food preservatives, photography and fire retardants.[2]

Calcium bromide has been shown to undergo complexation with triphenylphosphine oxide, allowing for removal of triphenylphosphine oxide from reaction mixtures without the use of chromatography.[3]

References[edit]

  1. ^ a b c Michael J. Dagani, Henry J. Barda, Theodore J. Benya, David C. Sanders “Bromine Compounds” Ullmann’s Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. doi:10.1002/14356007.a04_405
  2. ^ «Chemical Land 21». Retrieved 25 December 2008.
  3. ^ Rodríguez Hergueta, Antonio (2022). «Easy Removal of Triphenylphosphine Oxide from Reaction Mixtures by Precipitation with CaBr2«. Organic Process Research & Development. 26 (6): 1845–1853. doi:10.1021/acs.oprd.2c00104. S2CID 249558328.

External links[edit]

  • Calcium bromide at WebElements
  • MSDS
Источник

From Wikipedia, the free encyclopedia

Calcium bromide

Hydrophilite.GIF
Names
IUPAC name

Calcium bromide
Other names

Calcium dibromide
Identifiers

CAS Number
  • 7789-41-5 anhydrous check
  • 22208-73-7 dihydrate ☒

3D model (JSmol)
  • Interactive image
  • Interactive image
ChEBI
  • CHEBI:31338 check
ChemSpider
  • 23010 check
ECHA InfoCard 100.029.240 Edit this at Wikidata
EC Number
  • 232-164-6

PubChem CID
  • 24608
RTECS number
  • EV9328000
UNII
  • 87CNY2EEBH check

CompTox Dashboard (EPA)
  • DTXSID0044577 Edit this at Wikidata

InChI

  • InChI=1S/2BrH.Ca/h2*1H;/q;;+2/p-2 check

    Key: WGEFECGEFUFIQW-UHFFFAOYSA-L check

  • InChI=1/2BrH.Ca/h2*1H;/q;;+2/p-2

    Key: WGEFECGEFUFIQW-NUQVWONBAA

SMILES

  • Br[Ca]Br

  • [Ca+2].[Br-].[Br-]
Properties

Chemical formula

 CaBr2
Molar mass 199.89 g/mol (anhydrous)
235.98 g/mol (dihydrate)
Appearance anhydrous is hygroscopic colorless crystals
sharp saline taste
Density 3.353 g/cm3
Melting point 730 °C (1,350 °F; 1,000 K)
Boiling point 1,815 °C (3,299 °F; 2,088 K) (anhydrous)
810 °C (dihydrate)

Solubility in water

 125 g/100 mL (0 °C)
143 g/100 mL (20 °C)
312 g/100 mL (100 °C)
Solubility in alcohol, acetone soluble
Acidity (pKa) 9

Magnetic susceptibility (χ)

 -73.8·10−6 cm3/mol
Structure

Crystal structure

 rhomboid
Thermochemistry

Heat capacity (C)

 75 J/mol K

Std molar
entropy (S⦵298)

 130 J/mol K

Std enthalpy of
formation (ΔfH⦵298)

 -647.9 kJ/mol

Gibbs free energy (ΔfG⦵)

 -656.1 kJ/mol
Hazards
NFPA 704 (fire diamond)

NFPA 704 four-colored diamond

1

0

0
Lethal dose or concentration (LD, LC):

LD50 (median dose)

 4100 mg/kg (rat, oral)
1580 mg/kg (mouse, subcutaneous)
Related compounds

Other anions

 Calcium fluoride
Calcium chloride
Calcium iodide

Other cations

 Beryllium bromide
Magnesium bromide
Strontium bromide
Barium bromide
Radium bromide

Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).

☒ verify (what is check☒ ?)

Infobox references

Calcium bromide is the name for compounds with the chemical formula CaBr2(H2O)x. Individual compounds include the anhydrous material (x = 0), the hexahydrate (x = 6), and the rare dihydrate (x = 2). All are white powders that dissolve in water, and from these solutions crystallizes the hexahydrate. The hydrated form is mainly used in some drilling fluids.[1]

Synthesis, structure, and reactions[edit]

It is produced by the reaction of calcium oxide, calcium carbonate with hydrobromic acid or the reaction of calcium metal with elemental bromine.[1]

It adopts the rutile structure, featuring octahedral Ca centres bound to six bromide anions, which also bridge to other Ca centres.

When strongly heated in air, calcium bromide will react with oxygen to produce calcium oxide and bromine:

2 CaBr2 + O2 → 2 CaO + 2 Br2

In this reaction, the oxygen oxidizes the bromide to bromine.

Uses[edit]

It is mainly used as dense aqueous solutions for drilling fluids.[1] It is also used in neuroses medication, freezing mixtures, food preservatives, photography and fire retardants.[2]

Calcium bromide has been shown to undergo complexation with triphenylphosphine oxide, allowing for removal of triphenylphosphine oxide from reaction mixtures without the use of chromatography.[3]

References[edit]

  1. ^ a b c Michael J. Dagani, Henry J. Barda, Theodore J. Benya, David C. Sanders “Bromine Compounds” Ullmann’s Encyclopedia of Industrial Chemistry 2002, Wiley-VCH, Weinheim. doi:10.1002/14356007.a04_405
  2. ^ «Chemical Land 21». Retrieved 25 December 2008.
  3. ^ Rodríguez Hergueta, Antonio (2022). «Easy Removal of Triphenylphosphine Oxide from Reaction Mixtures by Precipitation with CaBr2«. Organic Process Research & Development. 26 (6): 1845–1853. doi:10.1021/acs.oprd.2c00104. S2CID 249558328.

External links[edit]

  • Calcium bromide at WebElements
  • MSDS
Источник

Бромид кальция

Поиск химических веществ по названиям или формулам.

Справочник содержит названия веществ и описания химических формул (в т.ч. структурные формулы и скелетные формулы).

Введите часть названия или формулу для поиска:

Бромид кальция

Брутто-формула:
Br2Ca

CAS# 7789-41-5

Названия

Русский:

Бромид кальция [Wiki]
Бромистый кальций

English:

Calcium bromide [Wiki]
Calcium dibromide
EINECS:232-164-6
calcium;dibromide(IUPAC)

German:

Calciumbromid [Wiki]
Calciumdibromid

العربية:

بروميد الكالسيوم [Wiki]
بروميد كالسيوم(IUPAC)

Ελληνικά:

French:

Bromure de calcium [Wiki]
Dibromure de calcium

Italiano:

Bromuro di calcio [Wiki]
dibromuro di calcio

日本語:

中文:

Варианты формулы:

$itemColor1(brown)Br^-_(A30,H,L2)Ca^++_(A-30,L2,H)$itemColor1(brown)Br^-

Br^-_(A30,L1.4,N0)Ca^++_(A-30,L1.4,N0)Br^-

Реакции, в которых участвует Бромид кальция

  • {M}O + 2H{X} -> {M}{X}2 + H2O
    , где M =
    Cu Ca Mg Sr Ba Hg Mn Cr Ni Fe Cd Zn Pb; X =
    Cl F Br I

  • CaSiO3 + 2H{X} -> Ca{X}2 + H2SiO3
    , где X =
    F Cl Br I

  • {M} + 2H{X} -> {M}{X}2 + H2″|^»
    , где M =
    Ca Mg Ba Sr Cd Zn; X =
    Cl F Br I

  • {M} + {Hal}2 = {M}{Hal}2
    , где M =
    Mg Ca Ba Sr Cd Zn; Hal =
    F Cl Br I

  • {M}(OH)2 + 2H{X} -> {M}{X}2 + 2H2O
    , где M =
    Ca Mg Ba Sr Cd Fe Ni Zn Mn; X =
    F Cl Br I

Источник
Бромид кальция
Общие
Систематическое
наименование		 Бромид кальция
Традиционные названия Бромистый кальций
Хим. формула CaBr2
Рац. формула CaBr2
Физические свойства
Состояние Бесцветные гигроскопические кристаллы
Молярная масса 199,90 г/моль
Плотность 3,353 г/см³
Термические свойства
Температура
 • плавления 760; 765 °C
 • кипения 806-812 °C
Мол. теплоёмк. 75,1 Дж/(моль·К)
Энтальпия
 • образования -685 кДж/моль
Химические свойства
Растворимость
 • в воде 14220; 312105 г/100 мл
Классификация
Рег. номер CAS 7789-41-5
PubChem 24608
SMILES

[Ca+2].[Br-].[Br-]
RTECS EV9328000
Приведены данные для стандартных условий (25 °C, 100 кПа), если не указано иное.

Бромид кальция — бинарное неорганическое соединение кальция и брома с формулой CaBr2. Бесцветные гигроскопичные кристаллы. Образует несколько кристаллогидратов.

Получение

  • Безводную соль получают действием брома на раскалённый оксид кальция:
[math]displaystyle{ mathsf{2 CaO + 2 Br_2 xrightarrow{700^oC} 2 CaBr_2 + O_2 } }[/math]
  • Кристаллогидрат получают действуя бромистоводородной кислотой на оксид кальция, его гидроксид или карбонат:
[math]displaystyle{ mathsf{CaO + 2 HBr xrightarrow{ } CaBr_2 + H_2O } }[/math]
[math]displaystyle{ mathsf{Ca(OH)_2 + 2 HBr xrightarrow{ } CaBr_2 + 2 H_2O } }[/math]
[math]displaystyle{ mathsf{CaCO_3 + 2 HBr xrightarrow{ } CaBr_2 + CO_2uparrow + H_2O } }[/math]

Физические свойства

Бромид кальция образует бесцветные диамагнитные кристаллы ромбической сингонии, пространственная группа P nnm, параметры ячейки a = 0,655 нм, b = 0,688 нм, c = 0,434 нм, Z = 2[1].

При кристаллизации из водных растворов образуются кристаллогидраты CaBr2•6H2O и CaBr2•3H2O. Из неводных растворов выделены разнообразные сольваты, например CaBr2•n NH3 (где n=8, 6, 2, 1), CaBr2•n CH3CH2OH (где n=4, 3, 1).

Химические свойства

  • Бромид кальция реагирует с плавиковой кислотой:
[math]displaystyle{ mathsf{CaBr_2 + 2 HF xrightarrow{ } CaF_2 + 2 HBr } }[/math]

Применение

  • Бромид кальция используется как дегидратирующий агент, катализатор.
  • Концентрированные растворы бромида кальция используются в качестве буровых растворов и теплоносителей в системах охлаждения и кондиционирования воздуха.
  • Добавка бромида кальция в серную лампу дает появление всплеска излучения в вблизи 625 нм, что важно для фотосинтеза растений, при этом не происходит увеличения излучения в других частях спектра.

Примечания

  1. ↑ Шаблон:Справочник химика

Литература

  • Рипан Р., Четяну И. Неорганическая химия. Химия металлов. — М.: Мир, 1971. — Т. 1. — 561 с.
  • Химическая энциклопедия / Редкол.: Кнунянц И.Л. и др.. — М.: Советская энциклопедия, 1990. — Т. 2. — 671 с. — ISBN 5-82270-035-5.
  • Справочник химика / Редкол.: Никольский Б.П. и др.. — 2-е изд., испр. — М.—Л.: Химия, 1966. — Т. 1. — 1072 с.
Источник

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