Key Practicals Part 2
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What is thermal decomposition?
Thermal decomposition is a chemical reaction where a compound breaks down into simpler substances when heated. Example: Decomposition of Calcium Carbonate
How is calcium carbonate decomposed?
Place calcium carbonate (limestone) in a boiling tube and heat it strongly with a Bunsen burner. Observations: Limewater turns cloudy, indicating carbon dioxide formation.
What is the conclusion of heating calcium carbonate?
Calcium carbonate decomposes upon heating to form calcium oxide and carbon dioxide. Reaction: CaCO₃ → heat → CaO + CO₂
What is distillation?
Distillation is a method used to separate liquids with significantly different boiling points. Example: Separation of Ethanol and Water
What apparatus is used in distillation?
Distillation flask, thermometer, and condenser are used in the distillation process.
How is ethanol separated from water using distillation?
Heat a mixture of ethanol and water in a distillation flask; ethanol boils first and condenses in the condenser. Observations: Ethanol distills before water.