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Questions and Answers
Which of the following decomposes to ferric oxide, sulphur dioxide, and sulphur trioxide?
What is the name of the product formed in the thermal decomposition of calcium carbonate?
What is the term used to describe a decomposition reaction carried out by heating?
What is the gas produced in the thermal decomposition of lead nitrate?
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What is the purpose of drilling holes at the base of a plastic mug in Activity 1.7?
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What is the product formed in the thermal decomposition of calcium carbonate that has many uses, including in the manufacture of cement?
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What type of reactions are decomposition reactions classified as?
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What is the source of energy for decomposition reactions?
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What is the purpose of the activity involving barium hydroxide and ammonium chloride?
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What is the characteristic of a reaction that absorbs energy?
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What is the name of the reaction that occurs when glucose combines with oxygen in the cells of our body?
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What is the type of reaction that occurs when a more reactive metal displaces a less reactive metal from its solution?
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What type of reaction is the decomposition of vegetable matter into compost?
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What is the purpose of cleaning the iron nails with sandpaper in Activity 1.9?
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What is the result of heating ferrous sulphate crystals in Activity 1.5?
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What is the general characteristic of a decomposition reaction?
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What is the formula for ferrous sulphate in Activity 1.5?
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What is the product of the decomposition of ferrous sulphate in Activity 1.5?
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Study Notes
Decomposition Reaction
- A decomposition reaction is a reaction where a single reactant breaks down into simpler products.
- Example: Ferrous sulphate (FeSO4) decomposes into ferric oxide (Fe2O3), sulphur dioxide (SO2), and sulphur trioxide (SO3) on heating.
- Ferric oxide is a solid, while SO2 and SO3 are gases.
Thermal Decomposition
- Thermal decomposition is a decomposition reaction carried out by heating.
- Example: Decomposition of calcium carbonate (CaCO3) to calcium oxide (CaO) and carbon dioxide (CO2) on heating.
- Calcium oxide is also known as lime or quick lime and has many uses, such as in the manufacture of cement.
Decomposition Reaction Examples
- Decomposition of lead nitrate (2Pb(NO3)2) to lead oxide (2PbO), nitrogen dioxide (4NO2), and oxygen (O2) on heating.
- Decomposition of barium hydroxide with ammonium chloride to produce heat.
Energy and Reactions
- Decomposition reactions require energy, which can be in the form of heat, light, or electricity.
- Reactions that absorb energy are known as endothermic reactions.
- Example: Decomposition of barium hydroxide with ammonium chloride is an endothermic reaction.
Displacement Reaction
- Displacement reaction is a type of reaction where a more reactive element displaces a less reactive element from a compound.
- Example: Iron nails (Fe) displacing copper from copper sulphate solution (CuSO4) to form iron sulphate and copper.
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Description
Learn about thermal decomposition reactions, including the decomposition of ferric oxide, calcium carbonate, and more. Understand the products formed and their uses in various industries.
