(a)
Interpretation:
Molecular art for Na2S solution needs to be drawn.
Concept introduction:
Ionic compounds are held together by electrostatic attractions between the anion and the cation. When an ionic compound dissolves in water, it dissociates into its individual ions. The energy released when ions interact with water molecules should be equal to energy needed to break the electrostatic attractions between the ions for ionic compounds to be soluble in water.
(b)
Interpretation:
Molecular art for MgCl2 solution needs to be drawn.
Concept introduction:
Ionic compounds are held together by electrostatic attractions between the anion and the cation. When an ionic compound dissolves in water, it dissociates into its individual ions.

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Chapter 3 Solutions
GENERAL,ORGANIC, & BIOLOGICAL CHEM-ACCES
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