Question

Most commonly used recrystallization solvents have boiling points at or below ______.

A) 50°C
B) 100°C
C) 150°C
D) 200°C

Answer 1

Recrystallization solvents commonly have boiling points at or below 200°C, with water being a typical solvent used in laboratories due to its boiling point of 100°C. The option (D) is correct.

Step-by-step explanation:

The most commonly used recrystallization solvents have boiling points at or below 200°C. This is because, at boiling points higher than 200°C, substances would require more specialized equipment to withstand the temperatures and preserve safety in the laboratory.

Therefore, solvents with boiling points lower than 200°C are preferable for fractional crystallization to separate components based on solubility. In practice, water is one of the most commonly used solvents for recrystallization because it has a boiling point of 100°C, which is easily manageable under standard laboratory conditions. Therefore, option (D) is correct.