Multiple Choice
Which type of force is primarily responsible for holding the atoms together in a solid metal?
97
views
13. Liquids, Solids & Intermolecular Forces
Intermolecular Forces
Multiple Choice
Which intermolecular force is dominant in a mixture of NH_3 and KCl?
A
London dispersion forces
B
Ion-dipole interactions
C
Hydrogen bonding
D
Dipole-dipole interactions
Verified step by step guidance1
Identify the types of species present in the mixture: NH_3 is a polar molecule capable of hydrogen bonding, and KCl is an ionic compound that dissociates into K^+ and Cl^- ions in solution.
Recall the main types of intermolecular forces: London dispersion forces (present in all molecules), dipole-dipole interactions (between polar molecules), hydrogen bonding (a special strong dipole-dipole interaction involving N, O, or F bonded to H), and ion-dipole interactions (between ions and polar molecules).
Consider that KCl dissociates into ions, so the interactions involving ions and polar molecules (ion-dipole interactions) are possible and often stronger than dipole-dipole or hydrogen bonding in mixtures containing ions.
Compare the strength of forces: ion-dipole interactions are generally stronger than hydrogen bonding and dipole-dipole interactions because they involve full charges interacting with dipoles, rather than partial charges.
Conclude that in a mixture of NH_3 and KCl, the dominant intermolecular force is ion-dipole interactions between the NH_3 molecules (dipoles) and the K^+ and Cl^- ions.
Related Videos
Related Practice
