How many moles of ions are present in 1 mole of NaCl dissolved in water?

• A. 4 moles
• B. 2 moles
• C. 0.5 moles
• D. 1 mole

Answer: (B)

Verified step by step guidance

1. Recognize that NaCl is an ionic compound that dissociates completely in water into its constituent ions: sodium ions (Na\^+) and chloride ions (Cl\^-).
2. Write the dissociation equation for NaCl in water: \(\mathrm{NaCl (s) \rightarrow Na\^+ (aq) + Cl\^- (aq)}\).
3. Identify that 1 mole of NaCl produces 1 mole of Na\^+ ions and 1 mole of Cl\^- ions upon dissociation.
4. Calculate the total moles of ions by adding the moles of each ion: \$1 \text{ mole Na\^+} + 1 \text{ mole Cl\^-} = 2 \text{ moles of ions}$.
5. Conclude that dissolving 1 mole of NaCl in water yields 2 moles of ions in solution.