Apentix/AP Chemistry/Unit 3: Intermolecular Forces and Properties/Question
AP Chemistrymediummcq1 pt

Which particle-level drawing best represents an aqueous solution of CaCl₂?

A.One Ca²⁺ per two Cl⁻ ions surrounded by water dipoles
B.CaCl₂ formula units floating intact
C.One Ca⁺ per two Cl²⁻
D.Ca²⁺ and Cl⁻ with water oxygens facing the chloride

Explanation

Core Concept

CaCl₂ dissociates 1:2 into Ca²⁺ and Cl⁻. Water's partially negative oxygens face the cation and partially positive hydrogens face the anions.

Correct Answer

AOne Ca²⁺ per two Cl⁻ ions surrounded by water dipoles

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