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Barium chloride, also known as BaCl2, is an inorganic compound with the formula BaCl2. It is one of the most commonly encountered water-soluble barium salts. Like the majority of other barium salts, it is white in color, toxic, and causes a yellow-green coloration in a flame. It’s also hygroscopic, converting to the dihydrate BaCl2.2H2O before becoming the monohydrate BaCl2.

Barium is an atomic number 56 chemical element that can be found in a variety of foods. This symbol is represented by the letter ‘Ba.’ It is the sixth element in the Group II elemental periodic table and an alkaline earth metal. Barium is not found in its natural state in its free form due to its high reactivity. The oxidation states of this element are +1 and +2. The oxidation states +1 and +2 of barium makes it a very strong basic oxide. Chlorine, on the other hand, is an atomic number 17 chemical element. The letter ‘Cl’ on the periodic table stands for it. Chlorine is a toxic, caustic green gas that can irritate the eyes and cause respiratory problems. In terms of weight, it is the second lightest member of the halogen family.

Barium Chloride 

When heated, barium chloride (BaCl2) transforms into a white solid chemical compound that is water soluble, hygroscopic, and produces a faint yellow-green flame. Barium salts can be found in a wide range of industrial applications.

The sulfate is used to make white paint, which is especially useful for exterior applications. In nature, barium chloride is a poisonous element. When anhydrous BaCl2 crystallizes, it produces an orthogonal crystal structure. The monoclinic crystal structure of barium chloride is known to exist in the dihydrate form of the compound.

The compound barium chloride has a unique structure.

One barium cation (Ba2+) and one chloride anion (Cl–) make up barium chloride. BaCl2 is its chemical formula. As a result, barium chloride’s molecular formula, or chemical formula, is BaCl2. It has a molecular mass of 208.23 g/mol in anhydrous form and a molecular mass of 244.26 g/mol in dihydrate form. It has an orthogonal crystalline structure in anhydrous form and a monoclinic crystalline structure in dihydrate form. It’s a chemical compound with the active ingredients barium (a soft, silvery metal) and chlorine (a poisonous green gas).

Barium Chloride Physicochemical Characteristics

  1. Barium chloride is a colorless solid with no discernible odor.
  2. Anhydrous Barium Chloride has a density of 3.856 g/cm3 and dihydrate Barium Chloride has a density of 3.0979 g/cm3.
  3. The melting point of anhydrous barium chloride is 962oCelsius, while the melting point of dihydrate barium chloride is 960oCelsius.
  4. The boiling point of barium chloride is 1560oCelsius.
  5. With a heat capacity of 123.9 J/mol K, barium chloride is an excellent heat conductor.
  6. According to standard measurements, the entropy of barium chloride is 123.9 J/mol K.
  7. The enthalpy of formation of Barium Chloride in the standard case is 858.56 kJ/mole of barium chloride.
  8. Its aqueous solution has a pH of 7, making it naturally neutral.
  9. The magnetic susceptibility of this compound is 72.6106 cm3/mol (barium chloride).
  10. It is crystalline, orthorhombic, and monoclinic in its anhydrous state and crystalline, orthorhombic, and monoclinic in its dehydrated state. At 0 °C, it dissolves in water at 31.2 g/100 mL; at 20 °C, it dissolves at 35.8 g/100 mL; and at 100 °C, it dissolves at 59.4 g/100 mL.

Chemical Properties of Barium Chloride 

Barium chloride interacts with water in the same way that any other binary chloride salt interacts with water. It dissociates in water to produce ions that are similar to Na+ and Cl–. It has no effect on the pH of the solution because it does not change it.

A double substitution process occurs when barium chloride solution is combined with sodium sulfate, which is beneficial. In an instant, an ionic reaction at the bottom of the test tube produces a white precipitate of barium sulfate.

As a response: 2NaSO4 + BaCl2 → 2NaCl + BaSO4

Applications of Barium Chloride 

  1. In caustic chlorine plants, barium chloride is used in the treatment of wastewater as well as the purification of brine (saline) solution.
  2. Barium chloride is used in the production of oil lubricants, PVC stabilizers, barium chromate, and barium fluoride, among other things. It’s also used, among other things, in steel case hardening.
  3. It’s used to make pigments, barium salts, fireworks, and chlorine and alkali.
  4. It’s used in a variety of applications, including crude oil refining, rubber production, and the paper industry.

The Health Consequences

This compound is extremely toxic when consumed. Magnesium sulfate (MgSO4) and sodium sulfate (Na2SO4) are likely antidotes because they combine to form BaSO4 (barium sulfate). BaSO4 is considered to be relatively non-toxic due to its insolubility

Conclusion

Barium Chloride Dihydrate is used in the production of PVC stabilizers, oil lubricants, barium chromate, and barium fluoride, as well as waste water treatment, among other things.

Because it is a low-cost, soluble barium salt with a wide range of applications, barium chloride is widely used in laboratories. In a variety of applications, it is frequently used as a sulfate ion detection method. The purification of brine solution in caustic chlorine plants, the production of heat treatment salts, the case hardening of steel, the production of pigments, and the production of other barium salts are all examples of industrial applications for barium chloride. Barium chloride is a chemical compound that is found in the natural world. Barium chloride is also used in fireworks to make them look more spectacular by giving them a vibrant green color. On the other hand, because of its toxicity, it is not widely used.