객관식
Which of the following salts would have the lowest solubility in water?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
객관식
According to general solubility rules, which type of anion will typically result in an insoluble compound when combined with most cations?
A
NO_3^- (nitrate)
B
SO_4^{2-} (sulfate)
C
Cl^- (chloride)
D
CO_3^{2-} (carbonate)
검증된 단계별 안내1
Recall the general solubility rules which help predict whether an ionic compound will dissolve in water or form a precipitate (insoluble compound).
Identify common anions that usually form soluble compounds with most cations, such as nitrate (\(NO_3^-\)), sulfate (\(SO_4^{2-}\)), and chloride (\(Cl^-\)). These are generally soluble except for some exceptions.
Recognize that carbonate (\(CO_3^{2-}\)) is an anion that typically forms insoluble compounds with most cations, except when paired with alkali metals (like \(Na^+\), \(K^+\)) or ammonium (\(NH_4^+\)).
Understand that the insolubility of carbonate salts arises because \(CO_3^{2-}\) tends to form strong ionic lattices that do not easily dissociate in water.
Conclude that among the given options, \(CO_3^{2-}\) (carbonate) is the anion that typically results in insoluble compounds with most cations according to general solubility rules.
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