what are the types of chemical reactions, Explain in detail.
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The five basic types of chemical reactions are combination, decomposition, single-replacement, double-replacement, and combustion. Analyzing the reactants and products of a given reaction will allow you to place it into one of these categories. Some reactions will fit into more than one category.
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Combination Reaction
- A reaction in which two or more reactants combine to form a single product is known as a combination reaction.
- It takes the form of X + Y → XY
- Combination reaction is also known as a synthesis reaction.
- Example of combination reaction: 2Na + Cl2 → 2NaCl
Decomposition Reaction
- A reaction in which a single compound breaks into two or more simpler compounds is known as a decomposition reaction.
- It takes the form of XY → X + Y
- A decomposition reaction is just the opposite of combination reaction.
- Example of a decomposition reaction: CaCO3 → CaO + CO2
- The reaction in which a compound decomposes due to heating is known as a thermal decomposition reaction.
Displacement Reaction
- A chemical reaction in which a more reactive element displaces a less reactive element from its aqueous salt solution.
- It takes the form X + YZ → XZ + Y
- It is also called a substitution reaction
- Example of displacement reaction: Zn + CuSO4 → ZnSO4 + Cu
Double Displacement Reaction
- A chemical reaction in which ions gets exchanged between two reactants which form a new compound is called a double displacement reaction.
- It takes the form of XY + ZA → XZ + YA
- It is also called a metathesis reaction
- Example of double displacement reaction:
- BaCl2 + Na2SO4 → BaSO4 + 2NaCl
Precipitation Reaction
- A chemical reaction that involves the formation of an insoluble product (precipitate; solid) is called Precipitation reaction.
- The reactants are soluble, but the product formed would be insoluble and separates out as a solid.
- The chemical equation by which a chemical change is described is adequate for reaction in solutions, but for reactions of ionic compounds in aqueous solution (water), the typical molecular equation has different representations.
- A molecular equation may indicate formulas of reactants and products that are not present and eliminate completely the formulas of the ions that are the real reactants and products.
- If the substance in the molecular equation that is actually present as dissociated ions are written in the form of their ions, the result is an ionic equation.
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