Barium Chloride Formula, Properties, and Molar Mass

Barium chloride is solid crystalline substance with a white color. It is an inorganic compound that easily dissolves in water. To obtain barium chloride, it can be synthesized by reacting with hydrochloric acid, barium carbonate, or barium sulfide. 

The reaction can be represented as follows:

BaCO3 + 2HCl → BaCl2 + CO2 + H2O

BaS + 2HCl → BaCl2 + H2S

When produced, barium chloride is usually purified by recrystallization.

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Barium Chloride Formula, Properties, Molar Mass

That this substance is toxic and can cause harm if consumed. It is crucial to handle it with caution and take necessary safety measures while working with it.

Barium Chloride Formula

The chemical formula for barium chloride is BaCl2. Its structure is ionic, consisting of one positively charged barium ion (Ba2+) and two negatively charged chlorine ions (Cl-).

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In the solid state, barium chloride forms a crystalline lattice structure. Each Ba2+ ion is surrounded by 8 Cl- ions, and each Cl- ion is surrounded by 8 Ba2+ ions, forming a three-dimensional of ions.

Barium Chloride + Aluminium Sulphate

When barium chloride (BaCl2) is reacted with aluminum sulfate (Al2(SO4)3), a double displacement reaction occurs, resulting in the formation of barium sulfate (BaSO4) and aluminum chloride (AlCl3).

The balanced chemical equation for the barium chloride and aluminum sulfate reaction:

3BaCl2 + Al2(SO4)3 → 2AlCl3 + 3BaSO4

In this reaction, Ba2+ ions from BaCl2 combine with SO42- ions from Al2(SO4)3 to form BaSO4, an insoluble white precipitate. At the same time, Al3+ ions from Al2(SO4)3 combine with Cl- ions from BaCl2 to form AlCl3, a soluble salt.

Barium chloride + Sodium sulfate

When sodium sulfate (Na2SO4) is mixed with barium chloride (BaCl2), a double displacement reaction occurs, forming barium sulfate (BaSO4) and sodium chloride (NaCl),

BaCl2 + Na2SO4 → BaSO4 + 2NaCl

Barium sulfate is an insoluble white solid that will precipitate out of the solution. This reaction is often used to test for sulfate ions in a solution.

Barium Chloride Molar Mass

The molar mass of barium chloride (BaCl2) is calculated by adding the atomic masses of its constituent elements.

Barium (Ba)  = 137.33 g/mol

Chlorine (Cl)  = 35.45 g/mol

Molar mass of BaCl2 = (1 × Ba atomic mass) + (2 × Cl atomic mass)

= (1 × 137.33 ) + (2 × 35.45 )

= 137.33 + 70.90 

= 208.23 g/mol

Properties of Barium Chloride 

1. Solubility: It is highly soluble at room temperature with a solubility of 31.2 g/100 mL in water.

2. Appearance: It is a white crystalline solid

2. Density: 3.856 g/cm3

4. Melting point: 963 °C

5. Boiling point: 1560 °C

6. It is hygroscopic and can absorb moisture from the air.

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