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Questions and Answers
What happens to sugar when evaporation exceeds saturation during crystallization?
What happens to sugar when evaporation exceeds saturation during crystallization?
- Sugar dissolves completely
- Gases are released
- Water remains unchanged
- Sugar sticks to the thread (correct)
What method is used to obtain sugar crystals from a saturated solution?
What method is used to obtain sugar crystals from a saturated solution?
- Freezing
- Filtration
- Distillation
- Evaporation (correct)
Which process is responsible for obtaining distilled water from sea water?
Which process is responsible for obtaining distilled water from sea water?
- Filtration
- Ion exchange
- Evaporation and condensation (correct)
- Boiling and cooling
What is the role of the delivery tube in the distillation of sea water?
What is the role of the delivery tube in the distillation of sea water?
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What creates impurities in the flask during the distillation of sea water?
What creates impurities in the flask during the distillation of sea water?
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Study Notes
Sugar Crystallization
- Sugar crystals are formed through a process involving evaporation and supersaturation.
- A thread is hung in a sugar solution, and as evaporation occurs, the solution becomes supersaturated.
- Sugar starts to adhere to the thread, leading to the formation of sugar crystals.
- This method of obtaining sugar crystals is known as crystallization.
Common Salt from Sea Water
- Common salt (sodium chloride) can be extracted from seawater.
- A flask is filled with seawater and sealed with a cork, ensuring no evaporation loss.
- Heating the flask causes the water to vaporize, leaving impurities behind.
- The vapor travels through a delivery tube and is then condensed back into liquid form.
- The resulting product is distilled water, while salt remains in the flask after evaporation.
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