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Types Of Chemical Reactions - Coggle Diagram
Types Of Chemical Reactions
COMBINATION REACTIONS
A combination reaction is a reaction in which simpler substances are combined into a more complex compound.
Combination reactions are also called synthesis reactions.
Examples❗️
The reaction of a metal with oxygen:
Magnesium metal reacts with oxygen to produces magnesium oxide.
2Mg(s) + O₂ → 2MgO(s)
The reaction of a nonmetal with oxygen:
Sulfur reacts with oxygen to produce sulfur dioxide gas.
S(s) + O₂ → SO₂(g)
The reaction of a metal and a nonmetal:
Lithium reacts with bromine gas to produce lithium bromide.
2 Li(s) + Br₂(g) → 2LiBr(s)
DECOMPOSITION REACTIONS
In a decomposition reaction, a single compound is broken down into two or more simpler substances.
Examples❗️
Ni(HCO3)₂(s) → NiCO3(s) + H₂O(/) + CO₂(g)
CaCO3(s) → CO₂(g)
2NaN3(s) → 2 Na (s) + 3N₂ (g)
Heat is usually required to start a decomposition reaction. Ionic compounds containing oxygen often decompose into a metal and oxygen gas.
For example, heating solid mercury (II) oxide produces mercury metal and oxygen gas.
SINGLE-REPLACEMENT REACTIONS
A single-replacement reaction is a reaction in which a more active metal displaces another less active metal in a compound.
Examples❗️
Fe(s) + 2HCI (aq) → FeCI₂ (aq) + H₂ (g)
2Na (s) 2H₂O (/) → H₂ (g)
Ca (s) + 2H₂O (/) → Ca(OH)₂(aq) → H₂(g)
DOUBLE-REPLACEMENT REACTIONS
In a double-replacement reaction, two ionic compounds in aqueous solution switch anions and produce an insoluble substance.
Examples❗️
2KI(aq) + Pb(NO3)₂(aq) → 2KNO3 (aq) + PbI₂(s)
Formation of a Precipiate
Na₂S(aq) + 2HCI (aq) → 2NaCI(aq) + H₂S(g)
Formation of a Gas
HCI(aq) + NaOH(aq) + H₂O(I)
Formation of a Molecular Compound
If either AD or CB is an insoluble compound, a precipiate will appear and there is a chemical reaction.
BaCI₂ (aq) + Kr₂CrO4(aq) → BaCrO4 (s) + 2KCI (aq)
If no precipitate is formed, there is no reaction.
NaCI(aq) + LiNO3 (aq) → NaNO3 (aq) + LiCI (aq)
NEUTRALIZATION REACTIONS
A neutralization reaction is the reaction of an acid and a base.
A neutralization reactions produces a salt and water.
Examples❗️
NaOH + H₂SO4 → Na₂SO4 + H₂O
Mg(OH)₂ + 2HCI → MgCı₂ + 2H₂O
HNO3 + KOH → KNO3 + H₂O
COMBUSTIONS REACTIONS
In a combustions reaction, carbon containing compounds, fuel burns in oxygen from the air to produce carbon dioxide, CO₂, water, H₂O, and heat or flame.
They are generally reactions that produce flames.
Most involve oxygen (from the air) as a reactant.
Also involve a fuel that reacts with O₂ to form one or more oxidixed products.
Complete combustion of hydrocarbon fuels results in the products CO₂ and H₂O.
CH4 + 2O₂ (g) → CO₂ (g) 2H₂O (g)
C3H8 (g) 5O₂ (g) → 3CO₂ (g) + 4 H₂O (g)
Examples❗️
CH4 (g) + 2O₂ (g) → CO₂ (g) + 2 H₂ O (g)
Combustion of Methane
C10 H8 + 12O₂ → 10CO₂ + 4H₂O
Burning of Naphthalene
2C₂H6 + 7O₂ → 4CO₂ + 6H₂O
Combustion of Ethane
