Final answer:
To determine the recrystallization solvent, we must consider the solubility of the compounds involved. While water is specifically mentioned for the provided sodium acetate and KBr example, acetonitrile is also mentioned as a versatile solvent for both salts and organic compounds.
Step-by-step explanation:
The recrystallization solvent for this lab exercise can be determined by understanding solvent properties and the solubility behavior of compounds in different solvents as it varies with temperature. The provided content suggests that the process involves the solubility of two compounds at different temperatures to allow for fractional crystallization, which enables the separation of compounds based on differences in solubility in a given solvent.
For the mixture of sodium acetate and KBr, the exercise specifies the use of water as the solvent in which both compounds can dissolve at 80°C and from which sodium acetate can be recrystallized upon cooling. Additionally, acetonitrile is mentioned as a solvent that can dissolve both salts and organic compounds, thus it would also be appropriate as a recrystallization solvent in the right context.
In the absence of a specific list, we cannot determine the exact solvent to be used. Nonetheless, if the choice includes water and acetonitrile, and considering the exercise provided regards sodium acetate and water's role in its recrystallization, water is a good candidate for the recrystallization solvent.