Multiple Choice
Which of the following salts would become more soluble in water as the temperature decreases?
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6. Chemical Quantities & Aqueous Reactions
Solubility Rules
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According to common solubility rules, which of the following groups of compounds is generally insoluble in water?
A
Sulfates (SO_4^{2-})
B
Nitrates (NO_3^-)
C
Carbonates (CO_3^{2-}) except those of alkali metals and ammonium
D
Chlorides (Cl^-) except those of Ag^+, Pb^{2+}, and Hg_2^{2+}
Verified step by step guidance1
Review the common solubility rules for ionic compounds in water, focusing on the general solubility of each group of ions listed.
Recall that nitrates (NO_3^-) are generally soluble in water without exceptions, so they are not typically insoluble.
Understand that sulfates (SO_4^{2-}) are mostly soluble, with some exceptions like barium sulfate and lead sulfate, but generally considered soluble.
Recognize that chlorides (Cl^-) are usually soluble except for specific exceptions such as silver (Ag^+), lead (Pb^{2+}), and mercury (Hg_2^{2+}) salts.
Identify that carbonates (CO_3^{2-}) are generally insoluble in water except when paired with alkali metals (like Na^+, K^+) and ammonium (NH_4^+), making them the group that is mostly insoluble.
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