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  • 2024-02-13
  • Sanjay Bhandari
  • Stannous Chloride, Basic Lead Acetate
  • 3477

A Short Notes on Stannous Chloride and Basic Lead Acetate

Chemical Formula

  • Copper pyrites – CuFeS2
  • Silver Sulphide – Ag2S
  • Lead Sulphide – PbS
  • Hematite – Fe2O3
  • Silicon Dioxide – SiO2
  • Magnesium Carbonate – MaCO3 

It is made in the forms of stannous chloride and Dihydrate Stannous Chloride.

Stannous-Chloride

Preparation of Stannous Chloride

Anhydrous stannous chloride is obtained when the dry hydrochloride acid gas flows in the hot tin.

Sn (s) + 2HCl (aq) → SnCl2 (aq) + H2 (g)

Stannous chloride is obtained by heating the tin with mercuric chloride.

Sn + HgCl2 → Hg + SnCl2

Anhydrous stannous chloride cannot be obtained by heating the hydrous stannous chloride(SnCl2.2H2O), as tin oxidechloride is formed upon heating.

SnCl2.2H2O → HCl + Sn(OH)Cl + H2O

Crystals of stannous chloride are obtained by evaporating the solution obtained by heating the tin with concentrated hydrochloride acid.

Sn + 2HCl + 2H2O → SnCl2.2H2O + H2

Stannous chloride solution is also obtained by heating stannous oxide or stannous hydroxide with concentrated hydrochloric acid. Crystals are obtained by evaporation.

SnO + 2HCl + H2O → SnCl2.2H2O

Sn(OH)2 + 2HCl → SnCl2.2H2O

Physical Properties

It is a transparent material like glass. It dissolves in water, ether, and alcohol.

Chemical Properties

Reaction with water: It hydrolysed in excess of water to form tin oxychloride.

SnCl2 (aq) + H2O (l) ⇌ Sn(OH)Cl (s) + HCl (aq)

Reaction with marcuric chloride: Hg2Cl2 is first formed by adding marcuric chloride solution to the stannous chloride solution, which is reduced by the addition of stannous chloride to Hg.

SnCl2 + 2HgCl2 → SnCl4 + Hg2Cl2

Hg2Cl2 + SnCl2 → SnCl4 + 2Hg

Reaction with ferric chloride: It reduces the ferric chloride to ferrous chloride.

2FeCl3 + SnCl2 → 2FeCl2 + SnCl3

Reaction with iodine: In the presence of HCl acid, it also reduces iodine.

I2 + 2HCl + SnCl2 → SnCl4 + 2HI

Reaction with NaOH: It reacts with NaOH to form stannous hydroxide precipitates which dissolve in excess of NaOH and dissolve sodium.

SnCl2 + 4NaOH → 2NaCl + 2H2O + Na2SnO2

Reaction with H2S gas: Black precipitate of stannous sulfide is obtained when hydrogen sulfide gas flows in the stannous chloride solution, which dissolves in the yellow ammonium sulfide solution.

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SnCl2 + H2S → 2HCl + SnS

SnS + (NH4)2S2 → (NH4)2SnS3

Reduction: Tin metal is obtained by heating SnCl2 with Zn.

SnCl2 + Zn → ZnCl2 + Sn

Uses of Stannous Chloride

  • The lab serves as a reagent.
  • Used as reducing agent.
  • The dyeing of cloth is used as a color bond in printing.
  • It is used as calico printing.

Basic Lead Acetate
[Pb(OH)2.Pb(CH3COO)2]

Basic-Lead-acetate

In the presence of air, Basic lead acetate is obtained by the reaction of lead and acetic acid.

2Pb + 2CH3COOH + O2 → Pb(OH)2.Pb(CH3COO)2

In the presence of air, Basic lead acetate is obtained by the reaction of lead and acetic acid.

2PbO + 2CH3COOH → Pb(OH)2.Pb(CH3COO)2

2PbCO3 + 2CH3COOH → Pb(OH)2.Pb(CH3COO)2 + 2CO2

Basic Lead Acetate Properties

It is white colored powder. It is toxic. It is soluble in water, acids and alcohol.

Reaction with carbon dioxide: It reacts with the reaction of carbon dioxide.

3[Pb(OH)2.Pb(CH3COO)2] + 4CO2 + 2H2O

→ 2[2PbCO3.Pb(OH)2] + 6CH3COOH

Basic Lead Acetate Uses

It is white colored powder. It is toxic. It is soluble in water, acids and alcohol.

Reaction with carbon dioxide: It reacts with the reaction of carbon dioxide.

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