Recrystallization

Interactive Video
•
Engineering, Physics, Science, Chemistry
•
11th Grade - University
•
Hard
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7 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main issue with solid precipitates formed during chemical reactions?
They are always pure.
They contain impurities.
They dissolve easily.
They are unstable.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which characteristic is crucial for the solvent used in recrystallization?
High solubility at room temperature and low solubility at high temperatures.
Low solubility at high temperatures.
High solubility at all temperatures.
Low solubility at room temperature and high solubility at high temperatures.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of using a seed crystal during recrystallization?
To dissolve impurities.
To provide a surface for ions to coordinate and initiate crystallization.
To increase the temperature of the solution.
To change the color of the solution.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of an ice bath in the recrystallization process?
To cool the solution and promote crystal formation.
To heat the solution.
To dissolve the solid further.
To maintain the solution at room temperature.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How can you test the purity of the recrystallized solid?
By tasting it.
By observing its solubility in water.
By measuring its melting point range.
By checking its color.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What happens to impurities during the recrystallization process?
They change the color of the crystals.
They remain in solution or are filtered out.
They evaporate with the solvent.
They become part of the crystal lattice.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to choose the correct solvent for recrystallization?
To allow the solid to dissolve and recrystallize with minimal impurities.
To change the color of the solution.
To increase the boiling point of the solution.
To ensure the solid remains dissolved at all times.
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