Final answer:
Aluminum foil will conduct electricity because it has free-moving electrons. Sugar, when dissolved in water, does not ionize and thus will not conduct electricity, making it a nonelectrolyte. Potassium Hydroxide dissolves into ions in water and is a strong electrolyte, so it will conduct electricity.
Step-by-step explanation:
To determine which substances will conduct electricity, we need to classify each as either an electrolyte or a nonelectrolyte. An electrolyte is a substance that when dissolved in water, breaks down into ions which are capable of carrying an electric charge. A nonelectrolyte does not break down into ions and therefore cannot conduct electricity.
a. Aluminum Foil is not a solution but is a metal, and metals conduct electricity due to the presence of free-moving electrons within the metal's structure. Therefore, aluminum foil will conduct electricity.
b. Sugar (C12H22O11), when dissolved in water, does not ionize and therefore is considered a nonelectrolyte. It will not conduct electricity when dissolved in water because it retains its molecular structure without forming ions.
c. Potassium Hydroxide (KOH), when dissolved in water, ionizes into K+ and OH- ions and is considered a strong electrolyte. This means that a solution of KOH will conduct electricity well due to the presence of these free-moving ions.