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Types Of Chemical Reactions, GettyImages-485878338-95d60d608ce24881a422e3d…
Types Of Chemical Reactions
Combustion
Definition
A combustion reaction is an exothermic reaction in which something reacts with oxygen.
Examples
Combustion of ethane
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O
Combustion of methanol
2CH3OH(g) + 3O2(g) → 2CO2(g) + 4H2O(g)
Combustion of methane
CH4(g) + 2 O2(g) → CO2(g) + 2 H2O(g)
Decomposition
Definition
Examples
H2CO3 → H2O + CO2
H2SO3 → H2O + SO2
2 H2O2 → 2 H2O + O2
A decomposition reaction occurs when one reactant breaks down into two or more products.
Combination
Definition
Examples
2Mg(s)+O2(g)→2MgO(s)
S(s)+O2(g)→SO2(g)
2Na(s)+Cl2(g)→2NaCl(s)
A combination reaction is a reaction in which two or more substances combine to form a single new substance.
Acid-Base
Definition
Example
HBr (aq)+KOH (aq)→H2O (l)+KBr (aq)
HCl (aq)+NH3(aq)→NH4Cl (aq)
HCl (aq)+NaOH (aq)→H2O (l)+NaCl (aq)
An acid–base reaction is a chemical reaction that occurs between an acid and a base.
Single/Double Displacement
Single Displacement
Definition
Examples
2 NaCl(aq) + F2(g) → 2 NaF(s) + Cl2(g)
Zn(s) + 2 HCl(aq) → ZnCl2(aq) + H2(g)
2 HCl(aq) + Zn(s) → ZnCl2(aq) + H2(g)
A single-replacement reaction replaces one element for another in a compound.
Double Displacement
Definition
Exapmles
Na2SO4(aq) + SrCl2(aq) → 2 NaCl(aq) + SrSO4(s)
BaCl2(aq) + Na2SO4(aq) → BaSO4(s) + 2 NaCl(aq)
CuCl2(aq) + 2 AgNO3(aq) → Cu(NO3)2(aq) + 2 AgCl(s)
A double-replacement reaction exchanges the cations (or the anions) of two ionic compounds.
