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What is Tin Oxide?

Tin oxide is an inorganic compound composed of tin and oxygen. Tin belongs to the fourteenth group of the modern periodic table. Another name of tin is stannum. Tin generally forms two types of oxides, one is stannous oxide and another one is stannic oxide. In this article, we will discuss the types of tin oxides, SnO2 compound name, SnO2 chemical name, tin oxide formula, and SnO2 name.

Types of Tin Oxide

Tin forms two types of oxides:

  1. Tin monoxide

  2. Tin Dioxide

1. Tin Monoxide - 

Tin monoxide is also known as stannous oxide. Tin monoxide is an inorganic compound composed of one tin and one oxygen element. The tin oxide formula is SnO. the oxidation state of the tin in this compound is +2. Therefore it is represented as tin (II) oxide. This compound exists in two forms; a stable form bluish-black in colour while another one is the metastable form also known as red form.

Properties of Tin (II) Oxide

Physical Properties of Tin Oxide

  • Tin (II) oxide exists in the solid- crystalline form.

  • It appears bluish-black in colour.

  • The melting point of tin (II) oxide is 1976℉.

  • The density of this is 6.45 g/cm3.

  • Tin (II) oxide is not soluble in water.

Chemical Properties of Tin Oxide

  • Tin (II) oxide decomposes when heated.

  • Tin (II) oxide reacts with oxygen and emits a green flame. In this reaction, the stannic oxide is formed as a product.

2SnO + O2 → 2SnO2

  • Tin (II) oxide gives a disproportionation reaction when heated in an inert atmosphere.

4SnO → Sn3O4 + Sn

  • In the above reaction, the formed Sn3O4 further reacts with the SnO and Sn metal to produce SnO2 and Sn as a final product.

Sn3O4 → SnO2 + Sn.

  • Tin (II) oxide is amphoteric in nature. It reacts with acid as well as with base.

  • It reacts with strong acids and forms tin (II) salts as a product.

  • It reacts with base and forms stannites containing Sn(OH)3- as an anionic form.

Preparation of Tin (II) Oxide

Tin (II) oxide is formed by heating the compound known as a hydrated form of tin oxide.

SnC2O4·2H2O → SnO + CO2 + CO + 2 H2O

2. Tin Dioxide- 

SnO2 name stands for Tin dioxide. Tin dioxide is also known as stannic oxide. Tin dioxide is an inorganic compound composed of one tin and two oxygen elements. SnO2 chemical name is a stannic oxide or tin (IV) oxide. The tin oxide formula for this oxide is SnO2. the oxidation state of the tin in this compound is +4. Therefore it is represented as tin (IV) oxide. Tin (IV) oxide also occurs in the mineral form in the earth’s crust. The mineral form of tin (IV) oxide is cassiterite. This mineral is one of the important and main ores of tin. SnO2 compound name represents the compounds of tin (IV) oxide which exist in ionic or covalent form.

Properties of Tin (IV) Oxide

Physical Properties of Tin (IV) Oxide

  • Tin (IV) oxide exists in solid form.

  • The colour of tin (IV) oxide is colourless.

  • The melting point of tin (IV) oxide is 2966℉.

  • The density of this is 6.95 g/cm3.

  • Tin (IV) oxide is not soluble in water.

Chemical Properties of Tin (IV) Oxide

  • Tin (IV) oxide is thermally more stable than the SnO.

  • Tin (IV) oxide is amphoteric in nature. It reacts with acid as well as with base.

  • It reacts with strong acids and forms tin (IV) salts as a product.

  • Tin (IV) oxide acts as a reducing agent as in this compound tin is in its highest oxidation state.

Preparation of Tin (IV) Oxide

  • The stannic oxide is formed as a product when stannous oxide reacts with the oxygen. This reaction is an oxidation reaction. In this reaction, the oxidation state of tin changes from +2 to +4.

2SnO + O2 → 2SnO2

  • Tin (II) oxide gives a disproportionation reaction when heated in an inert atmosphere.

4SnO → Sn3O4 + Sn

  • In the above reaction, the formed Sn3O4 further reacts with the SnO and Sn metal to produce SnO2 and Sn as a final product.

Sn3O4 → SnO2 + Sn.

Uses of Tin Oxides

  • Tin oxides are used in making ceramic glasses.

  • Tin oxide is used in the formation of different dyes.

  • Tin oxides are used in polishing the surfaces.

  • It is used as a sensor for ga sensing.

  • Tin oxides are used as a precursor for various chemical reactions.

  • It is used as an illuminating agent.

Did You Know?

  • Tin is a rare element found in the earth’s crust.

  • The main ore of tin is Cassiterite.

FAQ (Frequently Asked Questions)

Question: What are the Chemical Properties of the Tin (II) Oxide?

Answer: The chemical properties of tin (II) oxide are given below

  • Tin (II) oxide decomposes when heated.

  • Tin (II) oxide reacts with oxygen and emits a green flame. In this reaction, the stannic oxide is formed as a product.

  • Tin (II) oxide is amphoteric in nature. It reacts with acid as well as with base.

  • It reacts with strong acids and forms tin (II) salts as a product.

  • It reacts with base and forms stannites containing Sn(OH)3- as an anionic form.

Question: What are the Physical Properties of Stannic Oxide?

Answer: The physical properties of stannic oxide are given below:

  • Tin (IV) oxide exists in solid form.

  • The colour of tin (IV) oxide is colourless.

  • The melting point of tin (IV) oxide is 2966℉.

  • The density of this is 6.95 g/cm3.

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