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Chemical Formula Examples

Explore our comprehensive collection of chemical formulas organized by category and difficulty level.

Each example demonstrates the power of Equamistry's rendering capabilities.

Showing 114 of 114 examples

Water

H2O
Basic Compounds
beginner

Most common compound on Earth, essential for life

H2O

Carbon Dioxide

CO2
Basic Compounds
beginner

Greenhouse gas, product of combustion and respiration

CO2

Ammonia

NH3
Basic Compounds
beginner

Important industrial chemical, used in fertilizers

NH3

Methane

CH4
Basic Compounds
beginner

Simplest hydrocarbon, main component of natural gas

CH4

Oxygen

O2
Basic Compounds
beginner

Essential for respiration, makes up 21% of air

O2

Sodium Chloride

NaCl
Basic Compounds
beginner

Table salt, ionic compound

NaCl

Calcium Carbonate

CaCO3
Basic Compounds
beginner

Main component of limestone and marble

CaCO3

Sulfuric Acid

H2SO4
Basic Compounds
intermediate

Strong acid, widely used in industry

H2SO4

Calcium Hydroxide

Ca(OH)2
Basic Compounds
intermediate

Slaked lime, used in construction

Ca(OH)2

Aluminum Oxide

Al2O3
Basic Compounds
intermediate

Alumina, used in ceramics and abrasives

Al2O3

Magnesium Oxide

MgO
Basic Compounds
beginner

Used in refractory materials and medicine

MgO

Zinc Oxide

ZnO
Basic Compounds
beginner

Used in sunscreens and rubber production

ZnO

Iron(III) Oxide

Fe2O3
Basic Compounds
intermediate

Rust, hematite ore of iron

Fe2O3

Copper(II) Oxide

CuO
Basic Compounds
intermediate

Black copper oxide, used in ceramics

CuO

Silicon Dioxide

SiO2
Basic Compounds
beginner

Quartz, sand, main component of glass

SiO2

Potassium Oxide

K2O
Basic Compounds
intermediate

Used in glass and ceramic manufacturing

K2O

Sodium Oxide

Na2O
Basic Compounds
intermediate

Used in glass production

Na2O

Titanium Dioxide

TiO2
Basic Compounds
intermediate

White pigment in paints and cosmetics

TiO2

Barium Oxide

BaO
Basic Compounds
advanced

Used in optical glass and ceramics

BaO

Sodium Ion

Na+
Ions
beginner

Positively charged sodium ion, common in salts

Na{+}

Chloride Ion

Cl-
Ions
beginner

Negatively charged chlorine ion

Cl{-}

Calcium Ion

Ca2+
Ions
beginner

Divalent calcium cation, important in bones

Ca{2+}

Sulfate Ion

SO42-
Ions
intermediate

Polyatomic anion, common in minerals

SO4{2-}

Ammonium Ion

NH4+
Ions
intermediate

Polyatomic cation, found in fertilizers

NH4{+}

Phosphate Ion

PO43-
Ions
intermediate

Important in DNA and ATP molecules

PO4{3-}

Nitrate Ion

NO3-
Ions
intermediate

Common in explosives and fertilizers

NO3{-}

Hydroxide Ion

OH-
Ions
beginner

Makes solutions basic/alkaline

OH{-}

Carbonate Ion

CO32-
Ions
intermediate

Found in limestone and shells

CO3{2-}

Perchlorate Ion

ClO4-
Ions
advanced

Strong oxidizing agent

ClO4{-}

Magnesium Ion

Mg2+
Ions
beginner

Essential for chlorophyll and enzymes

Mg{2+}

Aluminum Ion

Al3+
Ions
intermediate

Trivalent metal cation

Al{3+}

Iron(III) Ion

Fe3+
Ions
intermediate

Ferric ion, found in rust

Fe{3+}

Copper(II) Ion

Cu2+
Ions
intermediate

Blue-colored cupric ion

Cu{2+}

Zinc Ion

Zn2+
Ions
beginner

Important in enzyme function

Zn{2+}

Bromide Ion

Br-
Ions
beginner

Halide ion, used in photography

Br{-}

Iodide Ion

I-
Ions
beginner

Essential for thyroid function

I{-}

Permanganate Ion

MnO4-
Ions
advanced

Purple-colored strong oxidizing agent

MnO4{-}

Dichromate Ion

Cr2O72-
Ions
advanced

Orange-colored oxidizing agent

Cr2O7{2-}

Hydrogen Chloride Formation

H2 + Cl2 → 2HCl
Chemical Equations
beginner

Synthesis of hydrochloric acid from elements

H2 + Cl2 -> 2HCl

Water Formation

2H2 + O2 → 2H2O
Chemical Equations
beginner

Combustion of hydrogen to form water

2H2 + O2 -> 2H2O

Limestone Decomposition

CaCO3 → CaO + CO2
Chemical Equations
intermediate

Thermal decomposition of calcium carbonate

CaCO3 -> CaO + CO2

Methane Combustion

CH4 + 2O2 → CO2 + 2H2O
Chemical Equations
intermediate

Complete combustion of methane

CH4 + 2O2 -> CO2 + 2H2O

Sodium-Water Reaction

2Na + 2H2O → 2NaOH + H2
Chemical Equations
intermediate

Vigorous reaction producing hydrogen gas

2Na + 2H2O -> 2NaOH + H2

Potassium Chlorate Decomposition

2KClO3 → 2KCl + 3O2
Chemical Equations
intermediate

Source of oxygen in laboratories

2KClO3 -> 2KCl + 3O2

Iron Ore Reduction

Fe2O3 + 3CO → 2Fe + 3CO2
Chemical Equations
advanced

Industrial iron production in blast furnace

Fe2O3 + 3CO -> 2Fe + 3CO2

Glucose Combustion

C6H12O6 + 6O2 → 6CO2 + 6H2O
Chemical Equations
advanced

Cellular respiration or glucose burning

C6H12O6 + 6O2 -> 6CO2 + 6H2O

Acid-Base Neutralization

NH3 + HCl → NH4Cl
Chemical Equations
intermediate

Formation of ammonium chloride

NH3 + HCl -> NH4Cl

Phosphorus Pentachloride Decomposition

PCl5 → PCl3 + Cl2
Chemical Equations
advanced

Reversible decomposition reaction

PCl5 -> PCl3 + Cl2

Magnesium-Acid Reaction

Mg + 2HCl → MgCl2 + H2
Chemical Equations
intermediate

Metal displacement of hydrogen from acid

Mg + 2HCl -> MgCl2 + H2

Zinc Displacement

CuSO4 + Zn → ZnSO4 + Cu
Chemical Equations
intermediate

Zinc displaces copper from copper sulfate

CuSO4 + Zn -> ZnSO4 + Cu

Aluminum Bromide Formation

2Al + 3Br2 → 2AlBr3
Chemical Equations
intermediate

Synthesis reaction of aluminum with bromine

2Al + 3Br2 -> 2AlBr3

Precipitation Reaction

BaCl2 + Na2SO4 → BaSO4 + 2NaCl
Chemical Equations
advanced

Formation of insoluble barium sulfate

BaCl2 + Na2SO4 -> BaSO4 + 2NaCl

Sodium Bicarbonate Decomposition

2NaHCO3 → Na2CO3 + H2O + CO2
Chemical Equations
intermediate

Baking soda thermal decomposition

2NaHCO3 -> Na2CO3 + H2O + CO2

Silver Displacement

Zn + 2AgNO3 → Zn(NO3)2 + 2Ag
Chemical Equations
intermediate

Zinc displaces silver from silver nitrate

Zn + 2AgNO3 -> Zn(NO3)2 + 2Ag

Phosphorus Combustion

4P + 5O2 → P4O10
Chemical Equations
advanced

Formation of phosphorus pentoxide

4P + 5O2 -> P4O10

Haber Process

N2 + 3H2 → 2NH3
Chemical Equations
advanced

Industrial ammonia synthesis

N2 + 3H2 -> 2NH3

Hydrogen Peroxide Decomposition

2H2O2 → 2H2O + O2
Chemical Equations
intermediate

Catalytic decomposition of hydrogen peroxide

2H2O2 -> 2H2O + O2

Calcium Chloride Hexahydrate

CaCl2·6H2O
Complex Structures
intermediate

Hydrated salt with six water molecules

CaCl2.6H2O

Copper Sulfate Pentahydrate

CuSO4·5H2O
Complex Structures
intermediate

Blue vitriol, common laboratory chemical

CuSO4.5H2O

Sodium Sulfate Decahydrate

Na2SO4·10H2O
Complex Structures
intermediate

Glauber's salt, used in detergents

Na2SO4.10H2O

Iron(II) Sulfate Heptahydrate

FeSO4·7H2O
Complex Structures
intermediate

Green vitriol, used as iron supplement

FeSO4.7H2O

Magnesium Sulfate Heptahydrate

MgSO4·7H2O
Complex Structures
intermediate

Epsom salt, used medicinally

MgSO4.7H2O

Aluminum Sulfate Octadecahydrate

Al2(SO4)3.18H2O
Complex Structures
advanced

Used in water treatment and papermaking

Al2(SO4)3.18H2O

Potassium Ferricyanide

K3[Fe(CN)6]
Complex Structures
advanced

Complex salt with coordination compound

K3[Fe(CN)6]

Tetraamminecopper(II) Sulfate Monohydrate

[Cu(NH3)4]SO4·H2O
Complex Structures
advanced

Deep blue coordination compound

[Cu(NH3)4]SO4.H2O

Calcium Phosphate

Ca3(PO4)2
Complex Structures
intermediate

Main mineral component of bones and teeth

Ca3(PO4)2

Magnesium Phosphate Octahydrate

Mg3(PO4)2.8H2O
Complex Structures
advanced

Used in ceramics and as flame retardant

Mg3(PO4)2.8H2O

Cobalt Sulfate Heptahydrate

CoSO4·7H2O
Complex Structures
intermediate

Pink crystalline salt used in electroplating

CoSO4.7H2O

Nickel Sulfate Hexahydrate

NiSO4·6H2O
Complex Structures
intermediate

Green salt used in nickel plating

NiSO4.6H2O

Zinc Sulfate Heptahydrate

ZnSO4·7H2O
Complex Structures
intermediate

White vitriol, used as fertilizer

ZnSO4.7H2O

Barium Chloride Dihydrate

BaCl2·2H2O
Complex Structures
intermediate

Used in laboratory tests and fireworks

BaCl2.2H2O

Hexaamminecobalt(III) Chloride

[Co(NH3)6]Cl3
Complex Structures
advanced

Yellow coordination compound

[Co(NH3)6]Cl3

Potassium Ferrocyanide Trihydrate

K4[Fe(CN)6]·3H2O
Complex Structures
advanced

Yellow prussiate of potash

K4[Fe(CN)6].3H2O

Chromium Sulfate Octadecahydrate

Cr2(SO4)3.18H2O
Complex Structures
advanced

Chrome alum, used in leather tanning

Cr2(SO4)3.18H2O

Manganese Sulfate Monohydrate

MnSO4·H2O
Complex Structures
intermediate

Pink salt used in fertilizers

MnSO4.H2O

Hexaaquanickel(II) Chloride

[Ni(H2O)6]Cl2
Complex Structures
advanced

Green coordination compound

[Ni(H2O)6]Cl2

Liquid Water

H2O(l)
States of Matter
beginner

Water in its liquid state at room temperature

H2O{l}

Ice

H2O(s)
States of Matter
beginner

Solid form of water below 0°C

H2O{s}

Water Vapor

H2O(g)
States of Matter
beginner

Gaseous form of water above 100°C

H2O{g}

Solid Salt

NaCl(s)
States of Matter
beginner

Crystalline sodium chloride

NaCl{s}

Carbon Dioxide Gas

CO2(g)
States of Matter
beginner

Gaseous carbon dioxide at standard conditions

CO2{g}

Dry Ice

CO2(s)
States of Matter
intermediate

Solid carbon dioxide, sublimates at -78.5°C

CO2{s}

Aqueous Ammonia

NH3(aq)
States of Matter
intermediate

Ammonia dissolved in water

NH3{aq}

Hydrochloric Acid

HCl(aq)
States of Matter
intermediate

Hydrogen chloride dissolved in water

HCl{aq}

Iron Metal

Fe(s)
States of Matter
beginner

Solid metallic iron

Fe{s}

Mercury

Hg(l)
States of Matter
intermediate

Liquid mercury at room temperature

Hg{l}

Solid Iodine

I2(s)
States of Matter
beginner

Purple-black crystalline iodine

I2{s}

Liquid Bromine

Br2(l)
States of Matter
intermediate

Red-brown liquid bromine at room temperature

Br2{l}

Chlorine Gas

Cl2(g)
States of Matter
beginner

Yellow-green poisonous gas

Cl2{g}

Copper Metal

Cu(s)
States of Matter
beginner

Solid metallic copper

Cu{s}

Silver Nitrate Solution

AgNO3(aq)
States of Matter
intermediate

Silver nitrate dissolved in water

AgNO3{aq}

Calcium Chloride Solution

CaCl2(aq)
States of Matter
intermediate

Calcium chloride dissolved in water

CaCl2{aq}

Sulfur Dioxide Gas

SO2(g)
States of Matter
intermediate

Pungent gas, air pollutant

SO2{g}

Quicklime

CaO(s)
States of Matter
beginner

Solid calcium oxide

CaO{s}

Sulfuric Acid Solution

H2SO4(aq)
States of Matter
advanced

Concentrated sulfuric acid in water

H2SO4{aq}

Ethane

C2H6
Organic Compounds
beginner

Simple alkane, component of natural gas

C2H6

Ethylene

C2H4
Organic Compounds
beginner

Important industrial chemical, plant hormone

C2H4

Acetylene

C2H2
Organic Compounds
beginner

Used in welding torches

C2H2

Benzene

C6H6
Organic Compounds
intermediate

Aromatic hydrocarbon, carcinogenic

C6H6

Ethanol

C2H5OH
Organic Compounds
intermediate

Drinking alcohol, biofuel

C2H5OH

Acetic Acid

CH3COOH
Organic Compounds
intermediate

Main component of vinegar

CH3COOH

Glucose

C6H12O6
Organic Compounds
intermediate

Blood sugar, essential for metabolism

C6H12O6

Octane

C8H18
Organic Compounds
intermediate

Component of gasoline

C8H18

Stearic Acid

C17H35COOH
Organic Compounds
advanced

Saturated fatty acid found in animal fats

C17H35COOH

Testosterone

C21H30O2
Organic Compounds
advanced

Male sex hormone

C21H30O2

Propane

C3H8
Organic Compounds
beginner

Alkane gas used as fuel

C3H8

Butane

C4H10
Organic Compounds
beginner

Alkane used in lighters

C4H10

Propene

C3H6
Organic Compounds
intermediate

Alkene used to make polypropylene

C3H6

Methanol

CH3OH
Organic Compounds
intermediate

Wood alcohol, toxic alcohol

CH3OH

Acetaldehyde

C2H4O
Organic Compounds
intermediate

Aldehyde used in chemical synthesis

C2H4O

Phenol

C6H5OH
Organic Compounds
advanced

Carbolic acid, used as disinfectant

C6H5OH

Toluene

C7H8
Organic Compounds
intermediate

Aromatic solvent, methylbenzene

C7H8

Sucrose

C12H22O11
Organic Compounds
advanced

Table sugar, disaccharide

C12H22O11

Stearic Acid

C18H36O2
Organic Compounds
advanced

Saturated fatty acid

C18H36O2