Multiple Choice
Which of the following compounds would be the most soluble in water?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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Which of the following compounds is soluble in water at 25 °C?
A
PbSO4
B
BaSO4
C
NaNO3
D
AgCl
Verified step by step guidance1
Recall the general solubility rules for ionic compounds in water at 25 °C. These rules help predict whether a compound will dissolve in water based on its ions.
Identify the ions in each compound: PbSO\_4 contains Pb^{2+} and SO_4^{2-}, BaSO\_4 contains Ba^{2+} and SO_4^{2-}, NaNO\_3 contains Na^{+} and NO_3^{-}, and AgCl contains Ag^{+} and Cl^{-}.
Apply the solubility rules: Nitrates (NO_3^{-}) are generally soluble in water without exceptions, so NaNO\_3 is expected to be soluble.
Sulfates (SO_4^{2-}) are mostly soluble except when paired with Pb^{2+} or Ba^{2+}, which form insoluble sulfates, so PbSO\_4 and BaSO\_4 are insoluble.
Chlorides (Cl^{-}) are generally soluble except when paired with Ag^{+}, which forms an insoluble chloride, so AgCl is insoluble.
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