Multiple Choice
Which of the following compounds will be more soluble in acidic solution than in pure water?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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Which statement best describes what happens when sodium chloride dissolves in water?
A
NaCl reacts with water to produce NaOH and HCl.
B
NaCl remains as intact molecules dispersed throughout the water.
C
NaCl dissociates into Na^+ and Cl^- ions, which become surrounded by water molecules.
D
NaCl forms a precipitate at the bottom of the container.
Verified step by step guidance1
Understand that sodium chloride (NaCl) is an ionic compound composed of Na^+ (sodium) and Cl^- (chloride) ions held together by ionic bonds in a crystal lattice.
Recall that when ionic compounds dissolve in water, the polar water molecules interact with the ions, overcoming the ionic bonds and causing the compound to dissociate into its constituent ions.
Recognize that NaCl does not react chemically with water to form new substances like NaOH or HCl; instead, it simply separates into Na^+ and Cl^- ions.
Know that NaCl does not remain as intact molecules because it is not a molecular compound; it exists as ions in the solid state and separates into ions in solution.
Understand that NaCl does not form a precipitate in water because it is highly soluble; the ions become surrounded by water molecules in a process called hydration or solvation.
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