Mg + O₂ → MgO
2Mg + O₂ → 2MgO
2Mg(s) + O₂(g) ⟶[heat/ignition]⟶ 2MgO(s)
Manufacture of refractory bricks and furnace linings using magnesium oxide.
Used in antacids and medicines because MgO is basic.
Magnesium ribbon burning test is used in laboratories to study combustion and oxidation reactions.
Used in pyrotechnics and flash photography due to the bright white flame produced by burning magnesium.
Important oxidation reaction in metallurgy and materials science.
CaO + H₂O → Ca(OH)₂
CaO + H₂O → Ca(OH)₂
CaO(s) + H₂O(l) ⟶ Ca(OH)₂(aq) + heat
Manufacture of slaked lime used in whitewashing.
Used in preparation of mortar and cement.
Neutralization of acidic soils in agriculture.
Used in water treatment and softening of hard water.
Important exothermic reaction used to demonstrate combination reactions in laboratories.
Calcium hydroxide is used in qualitative salt analysis and for preparation of bleaching powder.
N₂ + H₂ → NH₃
N₂ + 3H₂ → 2NH₃
N₂(g) + 3H₂(g) ⇌[Fe catalyst,\ 450^\circ C,\ 200\ atm]⇌ 2NH₃(g)
Industrial manufacture of ammonia by the Haber process.
Production of fertilizers such as urea and ammonium sulfate.
Manufacture of nitric acid, explosives and synthetic fibers.
Ammonia is used as a refrigerant and cleaning agent.
Important industrial equilibrium reaction in chemical engineering.
H₂ + Cl₂ → HCl
H₂ + Cl₂ → 2HCl
H₂(g) + Cl₂(g) ⟶[sunlight/UV\ light]⟶ 2HCl(g)
Manufacture of hydrochloric acid by dissolving HCl gas in water.
Hydrochloric acid is used in metal cleaning and pickling.
Used in preparation of chlorides and other industrial chemicals.
Important photochemical combination reaction.
Hydrogen chloride is used in laboratory salt analysis and qualitative inorganic analysis.
H₂ + O₂ → H₂O
2H₂ + O₂ → 2H₂O
2H₂(g) + O₂(g) ⟶[spark/ignition]⟶ 2H₂O(l) + heat
Used in hydrogen fuel cells for clean energy production.
Produces large amount of heat; used in oxyhydrogen flames for welding and cutting.
Demonstrates combustion and exothermic reactions in laboratories.
Water formed is essential in many industrial and biological processes.
Important reaction in rocket propulsion and aerospace engineering.
C + O₂ → CO₂
C + O₂ → CO₂
C(s) + O₂(g) ⟶[heat/ignition] CO₂(g) + heat
Major combustion reaction used for production of heat energy.
Basis of fuel burning in industries and thermal power plants.
Carbon dioxide is used in fire extinguishers and carbonated beverages.
Used by plants in photosynthesis.
Important reaction in environmental studies related to greenhouse gases and global warming.
Na + Cl₂ → NaCl
2Na + Cl₂ → 2NaCl
2Na(s) + Cl₂(g) ⟶[heat]⟶ 2NaCl(s)
Manufacture of common salt.
Sodium chloride is widely used in food preservation and seasoning.
Raw material in chlor-alkali industry for manufacture of NaOH, Cl₂ and H₂.
Used in preparation of saline solutions and in medical applications.
Important example of ionic bond formation and combination reaction in chemistry.
Li + Cl₂ → LiCl
2Li + Cl₂ → 2LiCl
2Li(s) + Cl₂(g) ⟶[heat]⟶ 2LiCl(s)
Lithium chloride is used in air-conditioning and dehumidifying systems due to its hygroscopic nature.
Used in lithium batteries and electrochemical industries.
Used as a flux in aluminium brazing and welding.
Important example of formation of an ionic compound by combination reaction.
Lithium compounds are important in ceramics and pharmaceutical industries.
K + Cl₂ → KCl
2K + Cl₂ → 2KCl
2K(s) + Cl₂(g) ⟶[heat] 2KCl(s)
Potassium chloride is widely used as a fertilizer (muriate of potash).
Used in preparation of potassium hydroxide and other potassium compounds.
Used in medicine for treatment of potassium deficiency.
Important example of highly reactive alkali metal combination reaction.
Used in salt analysis as a source of potassium ions.
Be + Cl₂ → BeCl₂
Be + Cl₂ → BeCl₂
Be(s) + Cl₂(g) ⟶[heat] BeCl₂(s)
Beryllium chloride is used in preparation of pure beryllium metal.
Important intermediate in organoberyllium compound synthesis.
Beryllium compounds are used in aerospace and nuclear industries because of low density and high strength of beryllium.
Demonstrates formation of predominantly covalent metal halides due to high polarizing power of Be²⁺.
Used in advanced materials research and high-temperature applications.
Mg + Cl₂ → MgCl₂
Mg + Cl₂ → MgCl₂
Mg(s) + Cl₂(g) ⟶[heat] MgCl₂(s)
Magnesium chloride is used in manufacture of magnesium metal by electrolysis.
Used as a de-icing agent and dust control chemical.
Used in preparation of magnesium oxychloride cement.
Important source of magnesium ions in chemical industries and laboratories.
Used in medicine and nutritional supplements.
Ca + Cl₂ → CaCl₂
Ca + Cl₂ → CaCl₂
Ca(s) + Cl₂(g) ⟶[heat] CaCl₂(s)
Calcium chloride is used as a drying agent because of its hygroscopic nature.
Used for de-icing roads and controlling dust on roads.
Used in refrigeration brines and cooling systems.
Used in preparation of calcium salts and in laboratory desiccators.
Important ionic combination reaction in inorganic chemistry.
H₂ + F₂ → HF
H₂ + F₂ → 2HF
H₂(g) + F₂(g) ⟶ 2HF(g) + large\ amount\ of\ heat
Hydrogen fluoride is used in etching and cleaning glass.
Used in manufacture of fluorocarbons and fluorinated organic compounds.
Important in uranium processing and nuclear industry.
Used in production of aluminium fluoride and cryolite for aluminium extraction.
Demonstrates the extremely high reactivity and oxidizing nature of fluorine.
Li + F₂ → LiF
2Li + F₂ → 2LiF
2Li(s) + F₂(g) ⟶[heat] 2LiF(s)
Lithium fluoride is used in manufacture of special optical glasses and ceramics.
Used as a flux in welding and metallurgy.
Important material in radiation detectors and X-ray optics.
Used in molten salt mixtures for nuclear reactors.
Demonstrates formation of highly stable ionic fluorides due to strong electrostatic attraction.
Be + F₂ → BeF₂
Be + F₂ → BeF₂
Be(s) + F₂(g) ⟶[heat] BeF₂(s)
Beryllium fluoride is used in preparation and purification of beryllium metal.
Used in molten salt mixtures for nuclear reactor technology.
Important in manufacture of special glasses and ceramics.
Used in fluoride chemistry and inorganic synthesis.
Demonstrates the anomalous covalent behavior of beryllium compounds despite being an alkaline earth metal.
Na + F₂ → NaF
2Na + F₂ → 2NaF
2Na(s) + F₂(g) ⟶[heat] 2NaF(s)
Sodium fluoride is used in toothpaste to prevent dental caries.
Used in water fluoridation for dental health.
Used as a flux in metallurgy.
Used in manufacture of fluorine-containing chemicals.
Important example of highly exothermic ionic compound formation involving fluorine.
Mg + F₂ → MgF₂
Mg + F₂ → MgF₂
Mg(s) + F₂(g) ⟶[heat] MgF₂(s)
Magnesium fluoride is used in optical coatings and anti-reflective coatings for lenses.
Used in ceramics and specialty glass manufacture.
Important material in ultraviolet optics because of high transparency to UV radiation.
Used in metallurgy and fluoride chemistry.
Demonstrates formation of stable ionic fluorides of alkaline earth metals.
K + F₂ → KF
2K + F₂ → 2KF
2K(s) + F₂(g) ⟶[heat] 2KF(s)
Potassium fluoride is used in organic fluorination reactions.
Used in glass etching and surface treatment.
Used as a flux in metallurgy and welding.
Important reagent in inorganic and industrial chemistry.
Demonstrates the extreme oxidizing power of fluorine and high reactivity of alkali metals.
Ca + F₂ → CaF₂
Ca + F₂ → CaF₂
Ca(s) + F₂(g) ⟶[heat] CaF₂(s)
Calcium fluoride occurs naturally as fluorite and is used in manufacture of hydrofluoric acid.
Used as a flux in metallurgy to lower melting points of ores.
Used in optical instruments because of high transparency to ultraviolet and infrared radiation.
Used in production of special glasses and enamel.
Important industrial fluoride compound and mineral in inorganic chemistry.