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Recrystallization by Mixed Solvent Technique Quiz

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Recrystallization by Mixed Solvent Technique Quiz

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Questions and Answers

What is the purpose of using a GOOD solvent in the mixed solvent technique for recrystallization?

To dissolve the compound very well even at room temperature (correct)

To prevent the recrystallization process

To create a permanent cloud in the solution

To dissolve the compound only at boiling temperature

What is the characteristic of a POOR solvent in the mixed solvent technique?

Facilitates the recrystallization process

Creates a homogeneous solution with the compound

Dissolves the compound very well even at room temperature

Does not dissolve the compound at both room and boiling temperature (correct)

What does it mean for two solvents to be miscible?

They fully dissolve in each other at any concentration (correct)

They are not suitable for recrystallization

They form separate layers

They have different boiling points

What is the purpose of keeping the solution hot during the recrystallization process from a mixed solvent system?

To prevent premature crystallization Signup and view all the answers

What is the first step in the recrystallization process from a mixed solvent system?

Dissolution in the least amount of hot GOOD solvent Signup and view all the answers

What is the purpose of using a mixed solvent technique for recrystallization?

The purpose of using a mixed solvent technique for recrystallization is to optimize the solubility of the compound by using a combination of a good solvent and a poor solvent. Signup and view all the answers

Explain the characteristics of a good solvent in the mixed solvent technique for recrystallization.

A good solvent in the mixed solvent technique for recrystallization is one that can dissolve the compound very well even at room temperature. Signup and view all the answers

Describe the characteristics of a poor solvent in the mixed solvent technique for recrystallization.

A poor solvent in the mixed solvent technique for recrystallization is one that does not dissolve the compound both at room temperature and even when at boiling temperature. Signup and view all the answers

What is the significance of complete miscibility between the good and poor solvents in the mixed solvent technique for recrystallization?

Complete miscibility between the good and poor solvents is important as it allows the formation of a homogeneous solution, which is essential for the recrystallization process. Signup and view all the answers

Why is it important to keep the solution hot during the recrystallization process from a mixed solvent system?

It is important to keep the solution hot during the recrystallization process from a mixed solvent system to ensure the dissolution of the compound and to prevent premature crystallization. Signup and view all the answers