Question

a student dissolved a small amount of blue powder in alcohol in a glass container by stirring it with a metal rod. which of the materials is soluble? the blue powder the metal rod the alcohol the glass container

Explanation:

A soluble material is one that can dissolve in a solvent. In this case, the blue powder dissolves in alcohol (the solvent). The metal rod and glass container are insoluble as they do not dissolve. Alcohol is the solvent, not the solute (the soluble material in a solution).

Answer:

the blue powder