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SnO2 - Tin Oxide

What is Tin Oxide?

The inorganic compound tin(IV) oxide, also known as stannic oxide, has the formula SnO2. Cassiterite is the mineral type of SnO2, and it is the most common tin ore. Tin metal is burned in the air to create synthetic tin(IV) oxide. The annual production is in the kilotons scale. In a reverberatory furnace at 1200–1300 °C, SnO2 is reduced to the metal with carbon. Tin(iv) oxide is a crystalline solid or powder that is white or off-white. Sublimes: 1800-1900°C, mp: 1127°C, density: 6.95 g/cm3 Water doesn’t remove it. Hydrochloric acid and concentrated sulphuric acid are soluble in it.

Other names – Stannic oxide

SnO2 Tin Oxide
Density 6.95 g/cm³
Molecular Weight/ Molar Mass 150.71 g/mol
pH (6–12)
Melting Point 1,630 °C
Chemical Formula SnO2

Tin Oxide Structure – SnO2

SnO2 - Tin Oxide

Physical Properties of Tin Oxide – SnO2

Odour Odourless
Appearance Yellowish or light grey powder
Covalently-Bonded Unit 2
Heavy Atom Count 3
Hydrogen Bond Acceptor 2
Solubility insoluble in water

Chemical Properties of Tin Oxide – SnO2

    • Sulfate is formed when SnO2 dissolves in sulphuric acid. SnO2 reacts with strong bases to form “stannates,” which have the formula Na2SnO3. The chemical equation is given below.

SnO2 + 2 H2SO4 → Sn(SO4)2 + 2 H2O

    • When tin(IV) oxide reacts with sodium hydroxide, stannate (IV) sodium and water are formed. At a temperature of 350-400°C, this reaction takes place. The chemical equation is given below.

SnO2 + 2NaOH → Na2SnO3 + H2O

Uses of Tin Oxide – SnO2

  • Tin oxide, which has a +4 oxidation state, can be used to make ceramic bodies opaque, as a mild abrasive, and as a fabric weighting agent.
  • The cosmetics ingredient review has determined that tin oxide is a healthy ingredient, based on the fact that it is not easily absorbed through the skin.
  • Tin oxide is used in dentistry and to render a precious metal polishing paste for high polishing of amalgam and precious metals when combined with water.
Test Your Knowledge On Tin Oxide!

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