Multiple Choice
Which one of the following compounds would form a precipitate when mixed with LiOH (lithium hydroxide) in aqueous solution?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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According to common solubility rules, which of the following compounds would be least likely to completely dissolve in water?
A
NH4Br
B
AgCl
C
NaNO3
D
K2SO4
Verified step by step guidance1
Recall the common solubility rules for ionic compounds in water: most ammonium (NH4+) salts, nitrates (NO3-), and alkali metal salts (like Na+ and K+) are generally soluble in water.
Identify the ions in each compound: NH4Br contains ammonium and bromide ions; NaNO3 contains sodium and nitrate ions; K2SO4 contains potassium and sulfate ions; AgCl contains silver and chloride ions.
Apply the solubility rules: ammonium salts (NH4Br), nitrates (NaNO3), and potassium salts (K2SO4) are typically soluble, meaning they dissolve well in water.
Recognize that silver chloride (AgCl) is a classic example of a sparingly soluble salt, meaning it does not dissolve well in water and tends to form a precipitate.
Conclude that among the given compounds, AgCl is least likely to completely dissolve in water based on these solubility rules.
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