Calcium chloride

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Generality
It formulates molecular CaCl2
Molecular size 110.99 amu (anidro)

147.02 amu (di-hidratado) 219.08 amu (hexa-hidratado)

Aspect white or colorless solid
I number CAS [ 10043-52-4 ] (anidro)

[ 0035-04-8 ] (di-hidratado) [ 7774-34-7 ] (hexa-hidratado)

MSDS
Other names
  • Chloride of cálcio(II)
Bulk Properties
Density 2.15 g/cm3 (anidro)

0.835 g/cm3 (di-hidratado) 1.71 g/cm3 (hexa-hidratado)

Solubility : 74.5 gC)

Soluble in etanol, ,

782 °C (1055 K)
>1600 °C (1870 K)
Perigos: Irritating
Structure
Coordination geometry (octahedral, 6-coordinate?)
Crystal structure deformed Uncle2
Hydrates dihydrate

hexahydrate

Related composites
Calcium fluorid

Calcium bromide Calcium iodide

Magnesium chloride

Strontium chloride

Table of content

General characteristics

Calcium chloride he is one of e . It is extremely soluble in water and it is deliquescent. He is one that it is presented in the solid state to the ambient temperature, and behaves as a typical one ionic halide. It has many common applications as brine will be refrigeration dust plants, control and ice in the roads, and the cement. It can be produced directly from limestone, but large amounts ploughs also produced the a by-product of the Solvay process. Because of its hygroscopic nature, it must be kept in tightly-sealed containers.

Chemical properties

The calcium chloride can serve of source of other calcium composites, for example for precipitation:

3 CaCl2(aq) + 2 K3PO4(aq) → Ca3(PO4)2(s) + 6 (aq)

CaCl2 casting it can be electrolisado to give the metal :

CaCl2(l)? Ca(s) + CL2(g)


Preparation

Calcium chloride is by-product of the Solvay process used will be the manufacture of sodium carbonates. It can also be produced by the action of hydrochloric acid on calcium carbonates CaCO3(s) + 2 HCl CaCl2(aq) + H2(l) + CO2(g)

You use

Millions of tonnes of calcium chloride in ploughs produced the US alone, and in 1990 its bulk price there was $182 to per tonne. It has variety of applications:

CaCl2 + 2 H2? CaCl2·2H2
The dissolving process is highly exothermic and rapidly produces temperatures of around 60°C (140°F). This can result in burns if humans or animals eat dry calcium chloride pellets. Small children ploughs lives susceptible you burns than adults, and calcium chloride pellets should be kept out out to their reach.
  • Intense Aided by the heat evolved during its dissolution, calcium chloride is also used an it hoists- melting compound. Unlike the lives-common sodium chloride salt (rock salt or halite), it is relatively harmless you plants and soil. It is also effective at to lower temperatures than sodium chloride. When distributed will be this uses, it usually takes the form of small white balls few millimetres in to diameter (see picture at top of page).
  • It is used in concrete mixes you help speed up the initial setting and you strengthen the concrete.
  • It is used will be dust control on adds highways, its hygroscopic nature keeps liquid to layer on the surface of the roadway, which holds dust down.
  • Calcium chloride tastes extremely salty and is used an ingredient in adds foods you give salty taste while not increasing the food's sodium content.

Precautions

Irritant. Wear gloves and goggles.

EXternal links

References

  1. N. N. Greenwood. Earnshaw, Chemistry of the Elements, 2nd ed., Butterworth-Heinemann, Oxford, UK, 1997.
  2. Handbook of Chemistry and Physics, 71st edition, CRC Press, Ann Arbor, Michigan, 1990.
 

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