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TYPES OF CHEMICAL REACTIONS, Selen Eryılmaz 182 10-A - Coggle Diagram
TYPES OF CHEMICAL REACTIONS
DOUBLE-REPLACEMENT REACTIONS
In this reaction, two ionic compounds in aqueous solution exchange their ions. As a result, insoluble matter is formed. If there is no precipitate, no reaction will occur. If there is no precipitate, there is no reaction.
SiO2(s)+4HF(aq)
SiF4(s)+2H20(l)
HCl+NaOH
NaCl+H2O
If the compounds formed as a result of the reaction are insoluble compounds, a precipitate is formed and a chemical reaction takes place. For example: BaCl2(aq)+K2CrO4(aq)
BaCrO4+2KCl(aq)
DECOMPOSITIONREACTIONS
In the reaction, a single compound splits into more simpler substances. It is also known as analysis reaction.
2H2O
2H2+O2
2AgBr
2Ag+Br2
Heat is usually required for the reaction to occur. If ionic compounds contain oxygen, they often decompose into metal and oxygen gas.For example: 2HgO(s)
2Hg(l)+O2(g)
SINGLE-REPLACEMENT REACTIONS
In this reaction, the metal that is active in the compound replaces the less active metal.
2Na(s)+2H2O(I)
2NaOH(aq)+H2(g)
Ca(s)+H2O(l)
Ca(OH)2(aq+H2(g)
K+NaCl
KCl+Na
NEUTRALIZATION REACTIONS
The reaction takes place with acid and base, and at the end of the reaction salt and water come out.
NH3(g)+HCl(g)
NH4Cl(k)
H2SO4+2KOH
K2SO4+2H2O
NaOH+HCl
NaCl+H2O
COMBUSTIONS REACTIONS
If only compounds containing carbon, hydrogen and oxygen are burned with oxygen in the combustion reaction, carbon dioxide (CO2), water (H2O) is formed and gives off heat. Exothermic redox reactions occur. Exceptionally, no heat is generated in the reaction of nitrogenous compounds.
Most of them contain oxygen because they are reactive. For example: C3H8+5O2
3CO2+4H2O+heat
They contain fuel that reacts with oxygen, so one or more oxidized products are formed. For example: 2C2+H6(g)
4CO2(g)+6H2O(g)+heat
They produce flames and they react quickly. For example:
CH4(g)+2O2(g)
CO2(g)+2H2O(g)+energy
Carbon dioxide and water begins to be produced as a result of the burning of all hydrocarbon fuels. For example: C3H6O+4O2
3CO2+3H2O+heat
COMBINATION REACTIONS
The reaction takes place when simple substances are combined into a more complex compound. This combination is known as the synthesis reaction.
Metal with oxygen:
2Mg(s)+O2
2MgO(s)
Metal and nonmetal: 2Li(s)+Br2(g)
SO2(g)
Nonmetal with oxygen: S(s)+O2(g)
SO2(g)
Selen Eryılmaz 182 10-A
