Question

Which of the following would you least expect to find in CaCl2(aq)?

a. H2O molecules
b. CaCl2 molecules
c. Ca2+ ions
d. Cl− ions

Answer 1

The least expected species to find in CaCl2(aq) is Cl- ions. Hence the correct answer is option B

Step-by-step explanation:

The correct answer is d. Cl- ions. When CaCl2 dissolves in water to form an aqueous solution (CaCl2(aq)), it dissociates into Ca2+ ions and Cl- ions. The water molecules (H2O) surround and interact with the ions to stabilize them, forming hydrated ions. In the case of CaCl2, the water molecules would surround and interact with the Ca2+ ions and Cl- ions.

Hence the correct answer is option B