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Types of Reactions. Four driving forces for chemical reactions. Formation of a solid Formation of water Transfer of electrons Formation of a gas. Main Types of Reactions. Oxidation/Reduction: Synthesis Decomposition Single Replacement Combustion Double Replacement: Precipitation
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Four driving forces for chemical reactions. • Formation of a solid • Formation of water • Transfer of electrons • Formation of a gas
Main Types of Reactions • Oxidation/Reduction: • Synthesis • Decomposition • Single Replacement • Combustion • Double Replacement: • Precipitation • Acid-Base
Oxidation- Reduction • The transfer of electrons • To be discussed later…
Synthesis • Two or more substances combine to form one product A + X AX
Decomposition • One reactant decomposes into two or more products. AX A + X
Single Replacement A + BX AX + B Y + AX X + AY
Replacement of • A metal by a more active metal • Hydrogen in water by a metal • Hydrogen in acid by a metal • Halogens by a more active halogen
Double Replacement AX + BY AY + BX The ions of two compounds in water solution exchange ions creating a solid, liquid or a gas.
Combustion • A substance reacts with oxygen releasing heat and light. • A + O2 → Various products • Commonly: CXHY + O2 → CO2 + H2O • Hydrocarbon reacts with oxygen (cumbustion/decomposition)