Multiple Choice
Which of the following phosphate salts is insoluble in water?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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Which of the following is true when a salt is dissolved in water?
A
The salt forms a covalent bond with water molecules.
B
The salt remains as a solid and does not interact with water.
C
The salt reacts with water to produce a gas.
D
The salt dissociates into its constituent ions.
Verified step by step guidance1
Understand that when a salt dissolves in water, it typically undergoes a physical process called dissociation, where the ionic compound separates into its individual ions.
Recall that salts are composed of positive and negative ions held together by ionic bonds, not covalent bonds, so they do not form covalent bonds with water molecules.
Recognize that the salt does not remain as a solid when it dissolves; instead, it breaks apart and interacts with water molecules through ion-dipole interactions.
Note that most salts do not chemically react with water to produce gases; such reactions are specific to certain compounds, not general salt dissolution.
Conclude that the correct description of what happens when a salt dissolves in water is that it dissociates into its constituent ions, which then become surrounded by water molecules (hydration).
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