Which of the following aqueous solutions contains the greatest number of ions per mole of solute dissolved?

• A. 1 M KNO3
• B. 1 M CaCl2
• C. 1 M C6H12O6 (glucose)
• D. 1 M NaCl

Answer: (B)

Verified step by step guidance

1. Identify the solute in each solution and determine how it dissociates in water into ions.
2. For 1 M KNO\_3, it dissociates into K\^{+} and NO\_3\^{-}, so it produces 2 ions per formula unit.
3. For 1 M CaCl\_2, it dissociates into Ca\^{2+} and 2 Cl\^{-}, so it produces 3 ions per formula unit.
4. For 1 M C\_6H\_{12}O\_6 (glucose), it is a molecular compound and does not dissociate into ions, so it produces 0 ions per formula unit.
5. For 1 M NaCl, it dissociates into Na\^{+} and Cl\^{-}, so it produces 2 ions per formula unit. Compare the total ions produced per mole of solute to determine which solution has the greatest number of ions.