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AP Chemistry
Unit 3 – Intermolecular Forces and Properties
Topic 3.7
Which of the following best helps to explain why the value of ΔH° for the dissolving of CaF2 in water is positive?
CaF2(s) dissolves in water to form CaF2(aq) particles.
CaF2(s) is insoluble in water.
Ca2+ ions have very strong ion-dipole interactions with water molecules in the solution.
Ca2+ ions have very strong ion-ion interactions with F− ions in the crystal lattice.
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AP Chemistry - 3.7 Solutions and Mixtures
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ΔH°
CaF2
Dissolving
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AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.
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