The given diagram shows steps of crystallization. In step C what is the main reason for leaving the solution to cool slowly?
Correct answer: A. To form larger, purer crystals
- A. To form larger, purer crystals
- B. To increase solubility
- C. To speed up evaporation
- D. To prevent crystallization
Explanation
Slow cooling allows orderly arrangement of solute particles. forming large and pure crystals.
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About Experimental Techniques in Chemistry
Separation methods are selected according to differences in solubility, particle size, volatility and sublimation behaviour. Filtration and crystallisation separate insoluble or dissolved solids, sublimation isolates suitable volatile solids, distillation separates liquids by boiling point, and solvent extraction transfers a substance between immiscible solvents.
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