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Ion–dipole forces Original Scenario-Based Practice

Chemistry · States of Matter & Solutions · Chemistry · Intermolecular Forces

1 Chemistry practice questions on Ion–dipole forces. Questions built around original scenarios.

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  1. 1.

    While exploring the warm subterranean ocean of an icy moon, an autonomous research probe analyzes the micro-scale hydration shells forming around dissolved mineral salts. The vessel's spectroscopic probes map how solvent water molecules spontaneously organize around dissolved magnesium cations and chloride anions. To configure the probe's molecular modeling engine correctly, the science team must define the fundamental behavior governing these interactions. Which statement accurately describes the orientation and nature of the ion–dipole forces observed in this solution?

    • A) Water molecules align their partially positive hydrogen atoms toward magnesium cations because like charges create stabilizing electrostatic bonds.
    • B) The ion–dipole forces involve coordinate covalent bonds formed when chloride anions donate lone pairs directly into the empty hybrid orbitals of water molecules.
    • C) Partially negative oxygen atoms orient toward the dissolved cations, whereas partially positive hydrogen atoms orient toward the dissolved anions through electrostatic attractions.
    • D) Nonpolar interactions dominate the hydration sphere because the neutral overall charge of water molecules cancels any attraction to ionic charges.

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