Which of the following best describes a strong electrolyte in an aqueous solution?

• A. A substance that does not dissociate into ions in water
• B. A substance that partially dissociates into ions in water
• C. A substance that completely dissociates into ions in water
• D. A substance that forms a precipitate in water

Answer: (C)

Verified step by step guidance

1. Understand the definition of an electrolyte: an electrolyte is a substance that produces ions when dissolved in water, allowing the solution to conduct electricity.
2. Recognize that a strong electrolyte is one that dissociates completely into its ions in aqueous solution, meaning nearly all the dissolved substance exists as ions.
3. Contrast this with a weak electrolyte, which only partially dissociates into ions, resulting in fewer ions in solution and lower conductivity.
4. Note that a substance that does not dissociate into ions in water is a nonelectrolyte and does not conduct electricity well.
5. Also, forming a precipitate in water is unrelated to the strength of electrolyte behavior; it refers to the formation of an insoluble solid, not ionization.