Multiple Choice
Which of the following substances is insoluble in water?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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Which one of the following compounds is soluble in water?
A
BaSO_4
B
PbSO_4
C
NaNO_3
D
AgCl
Verified step by step guidance1
Step 1: Understand the concept of solubility rules in water, which help predict whether an ionic compound will dissolve in water based on its ions.
Step 2: Recall that most nitrates (NO_3^-) are soluble in water without exceptions, so compounds containing the nitrate ion are generally soluble.
Step 3: Recognize that sulfates (SO_4^{2-}) have varying solubility; for example, BaSO_4 and PbSO_4 are generally insoluble or sparingly soluble in water.
Step 4: Note that most chlorides (Cl^-) are soluble, but silver chloride (AgCl) is an exception and is poorly soluble in water.
Step 5: Conclude that among the given compounds, NaNO_3 is soluble in water because it contains the nitrate ion, which is always soluble.
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