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Multiple Choice
When trying to dissolve a solid in water, which of the following compounds is most likely to be soluble according to general solubility rules?
A
PbI2
B
AgCl
C
NaNO3
D
BaSO4
Verified step by step guidance
1
Recall the general solubility rules for ionic compounds in water, which help predict whether a compound will dissolve (be soluble) or not (be insoluble).
Identify the common solubility trends: compounds containing alkali metal ions (like Na\^+) and nitrate ions (NO\_3\^-) are generally soluble in water.
Examine each compound: PbI\_2 (lead iodide) and AgCl (silver chloride) are typically insoluble or sparingly soluble due to the presence of heavy metal cations and halide ions.
BaSO\_4 (barium sulfate) is also known to be insoluble or only slightly soluble because sulfates of heavy alkaline earth metals tend to have low solubility.
NaNO\_3 (sodium nitrate) contains the sodium ion (Na\^+) and nitrate ion (NO\_3\^-), both of which are known to form soluble compounds, making NaNO\_3 the most likely to dissolve in water.