Final answer:
To separate naphthalene and potassium bromide, use the process of sublimation by heating the mixture to a temperature below the boiling point of potassium bromide, causing the naphthalene to vaporize and then condense back into solid form on a cooler surface.
Step-by-step explanation:
To separate naphthalene and potassium bromide, you can take advantage of the difference in their physical properties. Since naphthalene sublimes easily, you can heat the mixture to a temperature below the boiling point of potassium bromide, causing the naphthalene to vaporize and then condense back into solid form on a cooler surface. This process is known as sublimation. The remaining potassium bromide can be collected and separated from the naphthalene crystals.
Learn more about Separating substances based on differences in physical properties