Question 1 choose the statement that best reflects the three basic steps of any recrystallization dissolve the impure solid in a minimal amount of boiling solvent: cool the solution to form crystals, vacuum filter the solution to collect the pure crystals. dissolve the impure solid in an excess of solvent at room temperature; cool the solution to form crystals: vacuum filter to collect the pure crystals o dissolve the impure solid in an excess of boiling solvent: cool the solution to form crystals vacuum filter to collect the pure crystals. dissolve the impure solid in a minimal amount of solvent at room temperature; cool the solution to form crystals, vacuum filter to collect the pure crystals.

Dissolve the impure solid in a minimal amount of boiling solvent, cool the solution to form crystals, vacuum filter the solution to collect the pure crystals.

Explanation:

Recrystallization is a process when a solid with impurities is purified. To do this a solvent of the compound we want must be used. We need to use only the quantity necessary to dissolve the compound of interest, otherwise, the solvent will dissolve the impurities or it will interfere in the crystallization.

For most of the solids, the solubility increases with the increase of the temperature, so to speed up the process, heat must be added at the system, or the solvent must be boiling. Then, the solution will be cooled to form the crystals of the compound purified, and then it must be filtered in a vacuum because the crystals can slow down the filtration.

the product of the pressure and volume is also constant

what is the average time it took the car to travel 0.25 meters?

⇒ 2.23 seconds

what is the average time it took the car to travel 0.50 meters?

⇒ 3.13 seconds