Final answer:
Hot gravity filtration is a step in the recrystallization process used to separate impurities from a compound by filtering the hot solution so that only the pure compound crystallizes upon cooling.
Step-by-step explanation:
The question posed pertains to the process of hot gravity filtration used during the recrystallization experiment in chemistry. This technique is designed to remove impurities from a solid by dissolving the solid in a hot solvent and then allowing the desired product to crystallize upon cooling. During hot gravity filtration, a hot solution passes through a filter, typically porcelain filter, which traps any insoluble impurities. This step is crucial to ensure that only the pure compound will crystallize out upon cooling. The impurities must remain more soluble in the solvent at low temperatures compared to the target compound to ensure successful separation. If the impurities have similar solubility patterns as the compound of interest or are present in large amounts, the purification may be inefficient, and additional steps might be required.