Multiple Choice
According to general solubility rules, which solvent would best dissolve NaCl?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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According to general solubility rules, which of the following compounds is most likely to be soluble in water at room temperature?
A
PbI2
B
AgCl
C
NaNO3
D
BaSO4
Verified step by step guidance1
Recall the general solubility rules for ionic compounds in water at room temperature. These rules help predict whether a compound will dissolve in water based on its ions.
Identify the solubility of each compound based on these rules:
- Compounds containing alkali metal ions (like Na\+) and nitrate ions (NO\_3\-) are generally soluble.
- Most iodides (I\-) and chlorides (Cl\-) are soluble, except when paired with heavy metals like Pb\^{2+} or Ag\+.
- Sulfates (SO\_4\^{2-}) are generally soluble, but exceptions include BaSO\_4, which is insoluble.
Analyze each compound:
- PbI\_2 contains Pb\^{2+} and I\-, and lead iodide is known to be poorly soluble.
- AgCl contains Ag\+ and Cl\-, and silver chloride is also poorly soluble.
- NaNO\_3 contains Na\+ and NO\_3\-, both of which form soluble compounds.
- BaSO\_4 contains Ba\^{2+} and SO\_4\^{2-}, and barium sulfate is poorly soluble.
Based on these observations, determine which compound is most likely to dissolve in water at room temperature by selecting the one that follows the solubility rules for high solubility.
Summarize that NaNO\_3 is the most soluble compound among the options because nitrates and alkali metal salts are generally soluble in water.
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