A Short Notes on Stannous Chloride and Basic Lead Acetate
Stannous Chloride

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 – MaCO

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.

SnCl2.2H2 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.

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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