✔ 2. Names and formulae of inorganic compounds

Oleum

• Concentrated H₂SO₄ saturated with SO₃

• Also known as fuming sulfuric acid

• Important intermediate in industrial sulfuric acid production

COCl₂

• Diphosgene

• Highly toxic gas used in plastics and pesticides

Ca₃(PO₃)₂

Calcium phosphite

PbS

• Lead sulfide

• Found naturally as mineral galena

PbO

Lead oxide

PbSO₄

Lead sulfate

FeS₂

Pyrite

P₄O₁₀

• Commonly called Phosphorus pentoxide (P₂O₅ empirical)

• Powerful dehydrating agent

• Tetraphosphorus decaoxide

KCr(SO₄)₂.12H₂O

Potassium chromium(III) sulfate dodecahydrate

Dodeca-

Prefix indicating 12 water molecules

Hg₂Cl₂

• Mercury(I) chloride

• Calomel

HSO₅

Peroxymonosulfuric acid

H₂SO₅

Caro's acid

H₂S₂O₈

Peroxydisulfuric acid (Persulfuric acid)

Fe₃O₄

Iron(II,III) oxide

Black iron oxide

Magnetite

Fe₂O₃ (Iron(III) oxide)

Ferric oxide

Limonite

Mixture of hydrated iron(III) oxide minerals

CuSO₄.3H₂O

Copper(II) sulfate trihydrate

Tri-

Prefix indicating 3 water molecules

Copper(II) sulfate

Blue vitriol

KNO₂

Potassium nitrite

K+

Potassium ion

NO²⁻

Nitrite ion

K₂Cr₂O₇

Potassium dichromate

Cr₂O₇²⁻

Dichromate ion

HPO₃

Metaphosphoric acid

H₃PO₄

Orthophosphoric acid

NH₄Cl

• Salmiac

• Ammonium chloride

CaO

• Quicklime

• Burnt lime

• Calcium oxide

Slaked lime

Ca(OH)₂

Pb₃O₄

• Minium

• Red lead

• Lead(II,IV) oxide

MnO₂

Burel

H₂SO₅

pEROXOSURIC ACID