Which one of the following can be classified as a strong electrolyte?

• A. NH3 (ammonia) dissolved in water
• B. C6H12O6 (glucose) dissolved in water
• C. CH3COOH (acetic acid) dissolved in water
• D. NaCl (sodium chloride) dissolved in water

Answer: (D)

Verified step by step guidance

1. Understand what a strong electrolyte is: a substance that completely dissociates into ions when dissolved in water, resulting in a solution that conducts electricity very well.
2. Analyze each compound given: NH3 (ammonia) is a weak base and does not fully ionize in water; it mostly remains as molecules.
3. C6H12O6 (glucose) is a molecular compound that dissolves but does not ionize, so it does not produce ions to conduct electricity.
4. CH3COOH (acetic acid) is a weak acid that partially ionizes in water, meaning it only partially dissociates into ions.
5. NaCl (sodium chloride) is an ionic compound that completely dissociates into Na+ and Cl- ions in water, making it a strong electrolyte.