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1. In which glass is the sugar dissolved quickest?
2. Explain why this happens.
Assignment 13:
Assignment 14:
Observation: The water has evaporated and small crystals have been formed: copper sulphate crystals. Under the microscope the crystals appear as small blocks or cubes.
Conclusion: When a solution is left to stand the opposite of dissolving occurs. The dissolved substance crystallises into a solid in the form of crystals.
Assignment 15:
4. Which substance dissolved best?
Conclusion: Not all substances are equally soluble.
Assignment 16:
2. Where is the oil?
3. Can oil dissolve in water?
4. What is the reason for the answer above?
Assignment 17:
1. What happens?
2. Can you explain why this happens?
3. Complete.
The solubility of a material is determined by:
ASSIGNMENT 12
To determine how temperature affects solubility.
Requirements: Sugar
A glass of cold water
A glass of warm water
A teaspoon
What do you observe?
1. In which glass is the sugar dissolved the quickest?
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2. Explain why this happens.
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REMEMBER THE FOLLOWING IN CONNECTION WITH SOLUBILITY
Sugar is SOLUBLE in water.
The sugar is the DISSOLVED substance.
The water is the SOLVENT.
The sugar water is the SOLUTION.
HEAT increases the process of solution.
Water can only take a certain amount of a dissolved substance like sugar. When the water can not take more of the substance, we say that it is a saturated solution.
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