* Polarity: HCl is a polar molecule. The hydrogen atom has a partial positive charge (δ+), and the chlorine atom has a partial negative charge (δ-). This polarity allows HCl to form hydrogen bonds with water molecules, which are also polar.
* Nonpolarity: Cl₂ is a nonpolar molecule. Both chlorine atoms have the same electronegativity, so the electrons are shared equally, resulting in no overall charge separation.
* Intermolecular Forces: Water is a polar solvent and readily dissolves polar substances. The strong hydrogen bonding between water molecules and HCl molecules facilitates dissolution. Nonpolar substances like Cl₂ cannot form hydrogen bonds with water and are thus less soluble.
* Hydrogen Bonding: The hydrogen bonding between HCl and water molecules is a strong attractive force that enhances solubility. Cl₂ lacks the ability to participate in hydrogen bonding.
In Summary:
The polar nature of HCl allows it to interact strongly with water molecules through hydrogen bonding, making it more soluble than the nonpolar Cl₂.
