Chapter Name: Separation of Substances
Activity Name: Sublimation of camphor in Separation of Substances
The experiment involves observing the sublimation process of camphor, where it changes directly from a solid to a gaseous state without going through the liquid state.
- China dish
- Mixture of camphor and powdered salt
Step by Step Procedure:
- Take a china dish and place a mixture of camphor and powdered salt in it.
- Cover the dish with a funnel, ensuring that the tube of the funnel is closed with cotton.
- Set up a stand and place the dish on it.
- Heat the dish using a burner.
- As the dish is heated, observe the substance in the dish.
- The camphor undergoes sublimation, changing directly from a solid to a gaseous state.
- No liquid phase is observed during the process.
- The gaseous camphor may have a characteristic odor.
- Perform the experiment in a well-ventilated area or under a fume hood to prevent inhalation of the gaseous camphor.
- Ensure that the burner flame is stable and controlled to avoid accidents.
- Handle the china dish and other apparatus with caution to prevent any breakage or injuries.
Lesson Learnt from Experiment:
The experiment demonstrates the process of sublimation, where camphor undergoes a direct transformation from a solid to a gaseous state without passing through the liquid state.
This process can be useful in separating mixtures where one component can undergo sublimation, leaving behind the non-sublimable substances.