In order to dissolve a chemical sample in a recrystallization solvent, add the room-temperature solvent in an Erlenmeyer flask on a hot plate. Turn on the heat, starting at . Using a , add additional solvent from a second container on the heat source. Swirl the sample flask after each addition, and try to add in order to dissolve the solid.

just until it covers the sample

a low setting and increasing gradually

pipet

as little solvent as possible

Explanation:

In order to dissolve a chemical sample in a recrystallization solvent, add the room-temperature solvent just until it covers the sample in an Erlenmeyer flask on a hot plate. Turn on the heat, starting at a low setting and increasing gradually. Using a pipet, add additional solvent from a second container on the heat source. Swirl the sample flask after each addition, and try to add as little solvent as possible in order to dissolve the solid.

i think it's letter a.