Which of the following is considered 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 that 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. Recognize that NH3 (ammonia) is a weak base and does not fully ionize in water, so it is a weak electrolyte.
3. Know that C6H12O6 (glucose) is a molecular compound that dissolves as intact molecules without producing ions, so it is a nonelectrolyte.
4. Identify that CH3COOH (acetic acid) is a weak acid and only partially ionizes in water, making it a weak electrolyte.
5. Recall that NaCl (sodium chloride) is an ionic compound that completely dissociates into Na+ and Cl- ions in water, classifying it as a strong electrolyte.