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Types of Chemical Reactions, image, image, image, image, image, image -…
Types of Chemical Reactions
Single Displacement Reactions
Zn (s) + 2 HCl (aq) → ZnCl2 (aq) + H2 (g).
2 Fe2O3 (s) + 3 C (s) → Fe(s) + CO2 (g).
A single-displacement reaction, is a chemical reaction in which one element is
replaced
by another in a compound.
It can be represented generically as: A + B-C → A-C + B.
Ca (s) + 2 H2O (l) → Ca(OH)2 (aq) + H2 (g).
Combustion Reactions
Must involve O2 as one reactant.
2 C2H6 + 7 O2 → 4 CO2 + 6 H2O.
A substance reacts with
oxygen
from the air and transfers energy to the surroundings as
light and heat.
CH4 (g) + 2 O2 (g) → CO2 (g) + 2 H2O (g).
C10H8 + 12 O2 → 10 CO2 + 4 H2O.
Combination Reactions
Two or more elements or compounds (reactants) combine to form a single compound (product).
2 Na + Cl2 → 2 NaCl.
2 Li + Br2 → 2 LiBr.
2 Mg + O2 → 2 MgO.
Neutralization Reactions
A chemical reaction in which an
acid and base
quantitatively react together to f
orm a salt and water
as products.
HX + BOH → BX + HOH.
HCl + NaOH → NaCl + H2O.
H2SO4 (aq) + 2 KOH (aq) → K2SO4 (aq) + 2 H2O (l).
Decomposition Reactions
A single compound
splits into
two or more simple
substances.
Heat is usually required to start a
decomposition reaction.
2 H2O (l) → 2 H2 (g) + O2 (g).
CaCO3 → CaO + CO2.
2 NaN3 (s) → 2 Na (s) + 3 N2 (g).
Double-Replacement Reactions
Cu (s) + 2 AgNo3 (aq) → 2 Ag (s) + Cu(NO3)2 (aq).
BaCl2 (aq) + K2CrO4 (aq) → BaCrO4 (s) + 2 KCl (aq).
Two compounds react, and
positive ions
(cation) and the
negative ions
(anion) of the two reactants switch places, forming two new compounds or products.
Cl2 (aq) + 2 NaBr (aq) → 2 NaCl (aq) + Br2 (aq).
