Question

1. a solid compound of a group 1 (alkali) metal and a group 17 (halogen) element dissolves in water. the diagram above represents one type of solute particle present in the solution. which of the following identifies the solute particle and best helps explain how the solute particle interacts with water molecules? a. the particle is a negative ion, and the interactions are hydrogen bonds. b. the particle is a negative ion, and the interactions are ion - dipole attractions. c. the particle is a positive ion, and the interactions are ion - dipole attractions. d. the particle is a positive ion, and the interactions are dipole - dipole attractions.

Explanation:

Step1: Analyze the compound

A compound of a group 1 metal and a group 17 element is an ionic compound. When it dissolves in water, it dissociates into ions. Group 1 metals form positive ions (cations) and group 17 elements form negative ions (anions) in the compound.

Step2: Consider the nature of water

Water is a polar molecule, with a partial - positive charge on the hydrogen atoms and a partial - negative charge on the oxygen atom.

Step3: Determine the interaction

The interaction between an ion and a polar water molecule is an ion - dipole attraction. Since the diagram shows the water molecules with their oxygen atoms (partial - negative) facing the solute particle, the solute particle must be a positive ion.

Answer:

C. The particle is a positive ion, and the interactions are ion - dipole attractions.